how to make a background color in html

Solutions on MaxInterview for how to make a background color in html by the best coders in the world

showing results for - "how to make a background color in html"
Anna
30 Jun 2018
1<html>
2 
3<body style="background-color:red;">
4  <p> test <p/> 
5  <body/>
6  </html>
Alex
16 Jul 2017
1<body style="background-color: #fff">
2  <!---this will change the body color---!>
3
4</body>
Pietro
17 Mar 2020
1<body style="background-color:powderblue;">
2<p style="background-color:tomato;">This paragraph has a red background.</p>
3</body>
Simona
10 Jan 2021
1<html>
2  <body style="backgroung:red">
3  <body>
4</html>
Ana
09 Nov 2016
1@keyframes bgcolor {
2    0% {
3        background-color: #45a3e5
4    }
5
6    30% {
7        background-color: #66bf39
8    }
9
10    60% {
11        background-color: #eb670f
12    }
13
14    90% {
15        background-color: #f35
16    }
17
18    100% {
19        background-color: #864cbf
20    }
21}
22
23body {
24    -webkit-animation: bgcolor 20s infinite;
25    animation: bgcolor 10s infinite;
26    -webkit-animation-direction: alternate;
27    animation-direction: alternate;
28}
queries leading to this page
how to make text in the middle htmlcan you add background color using color in htmlhow to get background color in htmlto give fbackground colors in htmlbackground color htmlchange the background color of a website htmlhow to set background colour htmlhtml set color of the backhow to change the background color of website html csshow to make change background color in htmlhow to change background color of body htmlmake a background go to a different color htmmhtml css background colorhtml 22 3ca 3e 22 background colorhtml bg colorbackground color change htmlset html body color from csshow to add asection background clolorback colorapplying background color in htmlhtml how to set background colorto add background colour in htmlhtml site background colorchanging background color on webpage htmlwhat is the correct html for adding a background colorattribute for changing the background color in htmlhow to change body color in htmlhow to change bg color in htmladd bacground color htmlbackground color body htmlhow to give background color in htmlhow to set a background color in htmlwhy can t i set the background color in htmlpage color in htmlhow to create backgrund color in htmlhow to have different background colors in the same html pagechange the background color of the body htmladd white background htmlhow to change the colour page htmlhtml set the background colorhow to put background colour in htmlhtml set color of divback color in htmlhtml how to change background colorcss background color whole how to change a background color in htmlapply background color in htmlset background colorbackground collor on htmladd background color in html codehtml background color black 3fhtml background colocss div background colorbackgroung color in htmlbackg color htmlbackgorund colour htmlhow to change header background color htmlhow to make backround color htmlchange a bg color with htmlmake background a certain color htmlbackground color stylehow to change the background of an html pagebackground color tmlhow to add an backgroundcolor in htmlall background colors in htmlchanging background color csshow to add bg color in html cssblack background htmlhtml bbackground colorbackgorund colorsbackground color in htm 3blhtml 4 set background colorhtml code for changing background colorhow to change background colour in htmlcan we add color to web page in htmlbg color htmlxhange color of background htmlhow to put background color in csschanging the entire page background color htmlhow to change background colour of page htmlhow to change the background color of body in htmlset page background color htmlthe html code for background colorhtml background color 23how to set a coulour as a html background4 09change the background color of the page in htmlstyle background color inline codebackground color in html 5chow to add body background color in htmlhow to change section background color in htmlhow to set bgcolor in htmlhow to color full background in htmlbackground color html howbackground color website htmlchanging background color in html codewhy can 27t i change the background color of an 3ca 3e tag htmlchange bg color htmlmake a background colour for html pagehow to change color of all the div in htmlhow to add colored background in htmlhow to put color in html backgroundhow to make the background inviseble in csshow to change the background color of an html pagecolour background body htmlw3school html background color with codehow to change background color of body in htmlall background colours in htmlbackgroung colour for htmlhow to make a background color in htmlhow to add a background color in htmlwhat is the correct html for adding a background color 3fhow to make background a different color in htmltext are how to modify background color htmlwhat is background color change in htmlchange body color htmlchange the html page background colorhow to make your background color change htmlhtml backgroundcolorchange background color of photo htmlhow to change body background color in html stylehow to add the background color in htmlhow to add background color to htmlhow to change backgroung color of html pagechange background color in in htmlhow to make a changing backgrond in htmladding background color to form htmlbackground color full section htmladd background color htmlbackground color htmlsetting the background color in htmlhow to set body background color in htmlset backgroun color in html how to give html background colorhow to put a background color in htmlhow to change background colour on htmlfill background color htmlcolor bg htmlhow to add a background colour to htmlhow to add colour html backgroundmake background different color htmlhow to change backgroung color in html pagebackground color tag in htmlhtml background colorbody background color code in htmlchange background color of a div cssbackground color to html pagehow to chnage background colour in htmlhow do i add background color in htmlhtml backgound colorbackground color for htmlhtml h1 background colorhow to add background colour in html 3fbackground color on html bodybackground color style in htmlchange body background color htmlhow to change whole background color in htmlwhat should the background color of my html behow to change whole bg color in htmlhtml chanigng background colorhow to setbackground color htmlhow to put color background in htmlhtml how to set background coloyrhow to change background color in html csshow to background color in htmlhow to set color background in htmlhow to change backround color of htmlset background color to background color on page csscolocar background htmlhtml code for background colorinserting color in htmlhtml background colorhow to insert background color in html 3fbackground colors for htmlhtml define background colorhow to color the background in htmlhtml color mixerhtml code to set background colorhow to make a background black in htmlhow do i change the color of the background on htmlchnage background color in htmlhtml background color tagchange background of html pagehow to change background color with htmlhtml 3ca 3e background colorhtml how to change page background colorbackground color codes htmlhow to make html page colorhow to make a text box transparent in htmlhow to make whole background colored csshow to change body background colours for different pages in htmlhow to change html background colourhow to change web page background color htmlhow to change background color of image htmlbackground html5 plain colourhow to set the window background color in htmlchangeable background color htmlbackground color of page in htmlhow to change background color in htmlhow to background colour something in htmlset the background color to the htmlhtml change all background color cssinsert background color in htmlbg color htmlset background color for body in htmlhow to change background color on bodycss style background colorhtml to add background colorcolor background htmlhow to add backgroung color using htmlbackground color in html whitehow to set background colot in htmlwhat are the background color in htmlhow to change the background color of html pagehow to change the background color of page in htmlhow to make a html backgroundadd bg color htmlchanging background colour in htmlchange backgrouind color html template w3schoolshtml for background colorset html background colorchange bg color of entire html pagechange image background color to white csshow to color html backgroundw3schools background color htmlcolor code for html backgroundhow to switch background color in html csshtml code to change background color of pagemake background black in htmlhtml black backgroundset background color htmlhow to style background color in htmlhtml backgraund colorchange background color of body in htmlhow to change background htmlhtml change page colorhow do you add background color to your webpage htmlhtml background color attributehow to change color of background htmlbody html colorcolor html backgroundhtml 22a 22 background colorbackgruond color htmlbackground color for body in htmlhtml colour backgroundkind of background color in htmlnbackground color htmladd a background color in htmlhtml5 background colorbackground color in htmkhtml page bg colorusing html set background colorhow to change color background in htmlhtml changing the background colouecode in html for background colorchange the background color in htmlhow to change background colour in html pagebackground color in html namehow to make your background change htmlhow to change body background colours in htmlbackground colour in htmlset html section backgroudchange background in html codechange html bg colorhtml 2c change background colorhow to change the background on a html websitechacnge background color htmlbackgroud color htmlbackground color change html tagwhat is background color in htmlhtml change p background colorset background to color htmlhtml color background changehow to change background color of page in htmlchange background color htmhtml for adding a background color bg color in htmlhow to change the background color of a html pagehow to set the page background black htmlhow to background color of the page htmlhow to change site color in html what i s the correct html for adding a background color 3fbackground color using htmlhow to change the body color in htmlhow to change background on html pagehow to change background color of image in htmlchange backgroubd color htmlhow to set a black background in htmlcode to change background color in htmlset website background colorhow to add background color in w3schoolshtml colored page backgroundhow to get background page blue in htmlmake background a color htmlhtml apply background colorhtml code for color backgroundsetting background color htmlwhat is the correct html code for adding a background colorhow to set bg color in htmlhow to create a background color in htmlbody background color htmlw3schools html background colourhow to make html background coloradd background color to htmlhow to get background color in html body taghow to change background color in html inlinebody html background colorblack background for htmlhow to change section color in htmlchange html page background color over timehtml backgrtound colorhnmtl set backgorund coloirbackground colours for htmlexplain background colors and text color in htmlhtml code for web page background colorgiving background color in htmlbackground colors in htmlchange bg color html codehtml backround colorhow to make the background color change in htmlhow full background with color in htmlset background color in htmlhow can set background color in htmlbackground color options htmlhow to add a background colour in htmlcss change background color of bodyadding background color to bodyhtml for adding a backround colourprovide background color in htmlhow to edit colours in background htmlhow to make background black in htmlgive background color in htmlhtml background color w3schoolsbackground color code of htmlhow to change backround color on htmlhow to change the whole background color of the page in htmlbackgroundcolors htmlbackgorund color htmlhtml set body background colorbackground color in htmlhtml background colorhtml code to change background colorhow to add a back ground style in htlmhow to set different background colors in htmlhow to change the background color on a html pagechanging background color htmlset web page background colorw3school background colorhow to give background color in body 27 htmlhow do i change the background color of body in htmlw3s background color htmlchange background color of page htmlhow to add background color using htmlhow to change the background color on htmlset backgroung color htmlputting background color and text color in htmladd background colour in htmlhow to add color in background in htmlhtml p background colorhow to change backronund color htmlhow to set background color htmlbacground color htmlhow to change colour of background in htmlset html body background color how to change entire background color in htmlbackground coor on htmlhtml body style background coloradd color to body htmlhow to add background to a section in htmlset backgrouyund color of body htmlw3schools html background colorbackground page color in htmlhtml background coloursbody background color in html designhow to set background color to page in htmlhow to set background color in html for whole pagebackground color html w3schoolschanging the background color in htmlhow to change the color of the body in htmlchange background color in htmlstyle in html background color html codehtml code backround colourbootstrap changing background colorhow to change background text color in htmlchanging html background colorchange colors of background in htmlhow to set background color in htmlchange background color color in htmlset background color for the entire body in htmlhtml color backroundhow to customize background colour for cover page in htmlset the background color of html bodyhow to change background of website in htmlchange html backgroundbockgraound color in htmlsbackground body color in htmlhow to set background color for body in htmlbackground color in html taghow to change page bg color in htmlhow to to make background color change in htmlbakcgroiund color htmlhow to color a container border in htmlhtml background colorshow to add backroumd color for all ewlementsbackground color code htmlbody color htmlw3schools background colorhtml changing background colorchange background color body htmladding background color in htmlbody background colorhtml backgroung coloradd background color to body htmlbackground color html hew3 schools html backround colorwhat is the code for background color in htmlhtml how to make background colorchange backgrouns htmlcode to set background color in htmlhtml how to background colorgive background color to html tagbody bgcolor in html hdhow to color background color htmlset backgound color htmlhow to put color on background in htmlhtml form background colormake color legend javascriptchange background color of image htmlback ground color htmlhow to set a background colour in htmlbackground change htmlhow to change background color of whole page in htmlhow to set background color in html with stylebackgroundcolor htmlhtml change browser background colorhtml how to change the background colorchange backgroud of html pagechanging bgcolor htmlhow to keep full black background in htmlhow to make a white background htmlbackgroun color htmlhow to change color of background in htmlhow to make html page background colorbgcolor to background colorhow to add color behind text in htmlhtml background color changehow to set div background colorhtml all background colorcss internal page change background colorhtml 3cbody background colorchange body backgroundcss change body background colorchange background coloru htmlhow to set bgcolor in html of whole documentbackground color for html how to use code color in background of htmlbackgroundcolor in htmlhow to put a background color in html per pagehow change the background color in htmlcolor website background htmlhtml set page background colorhtml background color codehow to add background color and different stuff in htmlbackground color html w3set bgcolor of pagehow to add background color to body in htmlcode tag background colorbackground colour htmlchange backround color htmlbackground html with color background color htmlhtml body colorbackground colour for htmlbackground color in html in 23colorbackground color htmlhtml attributes background colorcode for changing background color in htmlhtml change body background colorstyle html background colorhow do i change background color htmlhtml how to make a background colorbody style color htmlhtml inline text background colorbackground color html codehow to add background colour in htmlbackground color with htmlcolor changing htmlchanging the entire page background color cssblue color htmlbackground color add in htmlhow to add a background color to htmlhtml style background colorto change background color in htmlbackground color of body html change background color htmlbackground colour chang in htmlchanging background color of body htmlhow to set a paragraph background coklor htmlstyle 3dbackground color htmlhtml change body colorhtml background page colorhtml 3a change header background colorhtml background web colorhow to add a background colourhtmlhtml change color backroundhow to change background text color on htmlhow do you change a background color in htmlhow to make background of html be a colorhow to set background color in html bodybackground colour code htmlhow to make full background colored in htmlhow to fill background color entire page html adding a background color in htmlhow change background color htmlhow to change the background htmlhow to make background colour htmlbackground color in htmlhtml changing color backgroundchange color background htmlchange svg background color csshow to add color to background in htmlw3schools background colourbackround colour in htmlbackgound color htmladd bgcolor htmlhtml change color of backgroundhow to change background color in bodyhow to add color to whole page htmlbackground html coloorbackground color value htmlhow to change the page background color in htmlhow to add background color htmlhtml color backgroundhow to change the background color of a website in htmlchange background color in html5change background color using htmlchange background color of html pageskin color htmlset color background htmlhtml tag for background colorhtml put background colorusing html how to make background colorhow to change backround color in htmlchange opacity of background color in htmlcss a background colorchaneg background color htmlhtml change backrounghtml how to add background colorhtml how to change background color of pagehow to edit background colour htmlhtml color background colorcolor changing background htmlset page background htmlhtml color change backgroundbackground colour change in htmlhow to make a color changing background in htmlhow to set the beakground color to the bodyset background color html elementhow to add background color to text in html 3fhtml color mhow to cahnge background htmlhow to set background color in html change background color based on value htmlset background colour in htmlhtml body set background colorbackground colorin htmlhow to set background color of page in htmlhow to give a background color in htmlhow to put background color in htmlset background color of html pagehow to create a changing html backgroundhow to change color background htmladding background color html how to change the background color htmlhtml change div background colorset background color of all htmlhow to set up backgound all black in htmlhow set the background color in htmlhtml select background colorw3schools change background colorset background color using inlinebackground color of html taghow to change backround in htmlbackground color html wihtebackground color example in htmlchange background color of body htmlhow to make backgroundcolor in htmlbackground color in csshtml add a background colorchange baackground color in htmlset html backgroynd colorchange the background color of the page htmlbackground coloursbackground color page htmlhow to change background color of html pagehtml background color with codestyle background color directly in htmlset entire background color htmlhtml page background colorput background colour in htmlhtml changing background color with html color codehow put background color in htmlhtml body change colorcolour changing backgrounf htmlhtml change background color of pagehow to set body background color of body in htmlhow to make the whole background one color for a page in htmlhtml code background colorchange html page background colorchange html backgroynd colorhtml body bgcolorchanging background color in htmlhow to change the color of your background in htmlhow to set color for h1 in htmlhow to add background color in htmlhtml for adding a background color 3fbackjground color in htmlhow to change the color background in htmlhtml page background colourpopular body background color in htmlhow to change background color of a page htmlpage background color in htmlbackground color html 3bmake background black htmlhow to put a background color in the head htmlbackground in html colorchanger background color htmlhtml body clourhow to change the background of a site htmlhtml color changing backgroundbackground color change in htmlbackground color html taghow to change html body background colorchange website background color htmlhow to change background color in html pagehtml default background colorchange background color onclick htmlhow to change screen color in htmlset background color of an entire websitepage html background colorhow to set a background color html in backgroundhow to change bg color htmlchange background color inlinechanging backtground of webpage htmlhow to set background color of a page in htmlbody html background color in bodyhtml 4 background colorhow to change the color of html backgroundbackground color codes in htmlbackground colors htmlchanging background in htmlturn background black in htmlhow to set backgorund colour htmlbackground color div csschnage background colour htmlset background color for html pagehow to add bg color in htmlpage background color htmlhow to edit backgroud colour htmlbg color in htmlhtml tag code background color tagbackground colour tag in htmlusing inline for background colorbackground color html code examplebackgroud color in htmlhow to change the background colour in html using codingbackground color html codehow to set page background color in htmlhow to change bg colour in htmlchanging the background color htmlhtml background colour change html colored backgroundsbackground colour for all the pagehow to make a background color htmlhow to colour background in htmlbackground color of a html pagehow to add a colorto the background in htmlhow do i change whole page background color in htmlhtml set background color htmlbaackground color htmlhow to make background color in htmlhtml change page background colorbackground c olor htmlhtml set backgroud colorbackground color html full pagebackground colour html codechanging background htmlhow to give color background in htmlcolor for background in htmlhow to change web page background color in htmlhow to change color of html pagehow to set the background color in htmlhow to set background colour in htmlhow to make a backgruond color for 3cp 3e htmlhow to se the website background color in htmlset backgroun colors htmlhow to set a color background in htmlhow to change background change text color in htmlhow to add a background color in html 3fset html page background colorhow to set background colour for html pagehow to make background color changing htmlstyle html background color html style how to change background colors on htmlhow to make the background color in htmlhtml make background colorchnage bodys background color htmlhow to do color background in htmlbackground color htmlchange backgrounf color htmlhow to make background changing background color htmlautomatic background color change in htmlbackground coloer for htmlchange background htmlhow to color background in htmlhow to change a html background colorhow to change html page background colorchange bg color in htmlhow to change the color of the background in htmlto add background color in htmlcolor background html stylehtml background color codeshow to add background colors in htmlhow to create a changing background in htmlbackground solid color htmloverall background color in html w3schoolsback ground color in htmlchange html background colorchange background section of htmlhow to change html background colorgive background color to p tagwww how to change background color in htmlchange body background colorhow to change color according to background in htmladding a background to text htmlhow to give background color to body in htmlhtml command for background colorset html page background color in cssbackground color of the page htmlhow to set a background color htmlput background color in htmlhtml background color stylehow to change the color of the background htmlhow to insert background color in htmlbackground color changing in htmlchange background color htmlset backgroud color htmlchange body color in htmlchange div background colorhtml page color changehow to make a background colors in htmlhtml site base color backgroundbackground color of body in htmlset background colour htmlhow to apply the background color in htmlhow to insert a background color in htmlbackground color para htmlhtml background colourtshtml background color w3csetting background color in htmlhow to fill a bg color in a part of html pagehow to chnage color of page background htmlcolour background html codehow set background color in htmlbackground color in html codehtmnl background colorhow to add a background color htmlhtml background collorhow to change the backroung color htmlbg colors html codeschange color body htmlhow to give body background color in htmlhtml tag for background color in htmlhow to set background color of text in htmlwhat is code of bg for htmlhow to put color in the html backgrounndall background color in htmlhow to add colored backround in htmlhow to set entire page background color entire page htmlset page colour html csschange the background color html button no background colorcahnge ackground color htmlhow to color body in htmlhow do you change the entire background color in html 3fadd backgorund colour to background htmlbody background color in htmlset background color for specfic page cssbackground colour html stylebackground color code in htmlhow to make the background a color in htmlchange the body color htmlhtml body background color codecolour background htmlhow to colour the background in htmlmake background color html4 colour background htmlhtml make background blackdifferent background color in htmlbg color change in htmlhtml change background colorhow to change the background color in htmlwhich html code is used to change background color of a web page 3fbgcolor change htmlhtml give background colorcolor page background color htmlchange the background color of a page htmlhtml background blackbgcolor in htmlhtml background color formhow to change background of webpage in htmlhtml bg colorschange the color background htmlbackground color html codedifferent background color htmlhow to set a color as a background in htmlset bagground colorbackground color html just headingset background color or html pagehtml set color behind page backgroundhtml background colirhtml a background colorwhich attribute is used to change or set the background colorhow to add colour htmlstyle body background color inlinehtml add background colorhow to add page background color in htmlhow to do html background colorhow to give color to background in htmlset background color of body htmlhtml code change background colorhow to make background colour in htmlbacground color html 23change background color section htmlhtml style page background colorwhite color overlay csswhat is the correct html to add background colorhow to change background in htmlbackgraound colour htmlcreate background color htmlsetbody colour inline csshow to give a page a background color htmlbackground color w3schoolscreating a background color in htmlhow to change background colour of body in html how to change background color htmlcss body background colorbody color in htmlwhere to add background color in htmlhow to set background colorhow to set the background color of a page in htmlhtml area tag background colorchange background color on htmlhow to change backgorund color htmlho to make the background blue in htmlhtml body background colorchanging backgorund colours in htmlset html background color htmlhow to make a html background colorbackground color in html codehow to change background color of p in htmlhtml adding background colorhtml web page background color codehtml body background colorw3schools html background colorsgive backgroundcolor in htmlhow to change background color on html pagechanging the background color of a htmlall of page background colors in htmlhtml color background codeadd color to background htmlhow to add colour in background in htmlhow to change the background of htmlcolor and background color tag in htmlhtml body background colourwhat i s the correct html for adding a background color 3fhow to change the background color of html taghow to change color of body htmlhow to create html with title and backround colorhtml background page colourglut background colorbackground html colorhtml set back ground colorhow to give section background color in htmlset background color to section htmlhtml code for background color 27adding a background color in htmlhow to add background color to bodyhow to make a background color on htmlto color background htmlbakcground color htmlhow to change the background color of the header in htmlhow to add background color to a div in htmladd a background color htmlstyle background color htmlhow to change the background of your website in htmlchange backgrounf color in htmlcolor code in html for backgroundbackground color code for htmlhtml page background color changehow to set body color htmlhow to change body color htmlhow to set the backgound color in htmlhow to change backgroundcolor in htmlhtml tags background colorred color background htmlbackround color htmlchenge background color in htmlhtml backcolorhow to add color in the head in htmladd css background colorhow to provide background color in htmladd background color in htmlwebpage background colorbackgroind color htmlhtml th color backgroundhow to change background color in webpagehtml set body colorhow to set text background color in htmlhow to set different background color in htmlbackground color of htmlbackground color page in htmlhow to add background color for htmlhow to change background colour htmlhow to set colour as background in htmlbg color in background in htmlhow to make a background color for htmlhtml background color bodyadd background color html code add background color syntaxchange colour of backghround in htmlcode for background colour in htmladd color in background htmlhow to change background colors in htmlhtml how to make the background colorcan i apply background color directly to elment in htmlcode for bgcolor in htmlbg colors htmlbackground color html bodyhtml background color htmlhow to change the background in htmlhow to set background color htmhow to make body background color in htmlset backround color htmlhomepage background color htmltype on the background color htmlhtml set background colorbackground colur htmlbackground color html 23chagne background color of websitecss code for changing background colorhtml with background colorhow to put backgroupnd color inline htmlchange the page background in htmlcode background color htmlbackground color for page in htmlbackground color html attributehow to change header background color in htmlhow to change the colour htmlbackground color i htmlhow to set a colour for the background of your whole html pagecode for background color in htmlhow to change background color on htmlhow to change color of html backgroundhtml change bg colorset the background color in htmlhtml back ground in thwo colorthow to apply background color in htmlhow to set html page background colorhow to set the background color of the whole page in htmlchange background colour htmlhtml set background colourhow to make different background color in htmlbackground color change csshow to change the body color html how to add a background color in html 3fchange the cbackground color htmlhtml background colourchange background color of htmlhow to change the background colour in htmlhow to ser background color htmlset a background color in htmlhow to set backerround color in htmlbackcolor htmlwhat dshould the background color of my html ehow to color the page in htmlhow to make the whole background one color in htmlhtml change backgrund colorwhere to put background color in htmla tag background colorhtml make black backgroundreplace white backgroundpage background colour htmlhow to change body background color in htmlhow to change color background in html homepagehow to change the background colorin htmlbackground color code in htmlhow to set html background colorhow do i change background color in htmlhtml changing the background colorhow to make a background change color in htmlhow to make abackground color in htmlbackground coloue htmlhow to make background color htmlhow to change the background of a website in htmlhtml element background colorchange bgcolor in htmlhow to color the whole page htmlstyle background color html codehtml page colorhow to change html background color 3cstyle 3ehow to change the html color backgroundhow to do background color in htmlpage background color codebackgroung color htmlbackground color reacthtml how to add black backgroundbackground color of html pagecodes for background color in htmlhow to change color of website htmlset backgroundcolor inline htmlhow to add background in tag htmlhow to chaange background color in htmlhow to change color of backround in htmlwhat are background colour name in htmlbackground color attribute in htmlhow to add 26 change background color in htmlbackground color htmllhow to change whole page background color in htmlbackground color in htmlhow to make a background color in html