how to frame a picture with color css

1/* Simple thin border */
2img { 
3   border:1px solid #021a40;
4}
5
6/* Double Border */
7img {
8   padding:1px;
9   border:1px solid #021a40;
10}
11
12/* Double Border with different inside border color*/
13img {
14   padding:1px;
15   border:1px solid #021a40;
16   background-color:#ff0;
17}