css change background color

1body {
2  background-color: green;
3}

1html,body {
2  background-color: red;
3}

1/* Use the following code: */
2html {background-color: #fefefe;} 
3/* You can change the hexedecimal code to RGB, RGBA, name & more colors!*/

1/* To apply color to background you have to use 'background-color' property and value of property is color name. */
2html,body {
3  background-color: blue;
4}

1background: linear-gradient(110deg, #fdcd3b 60%, #ffed4b 60%);

1background-color: green;