What code should be use when we want a colour full border for an image ?

Answer 1

Visit in:
http://www.html.am/html-codes/image-codes/html-image-borders.cfm

Answer 2

Either use CSS for that or use the style attribute in the img tag like this: <img src="" style="border: solid 2px red" border="2px" alt="">

Answer 3

add in css.
img {
border-top: 1px solid red;
border-right: 1px solid blue;
border-bottom: 1px solid orange;
border-yellow: 1px solid green;
}
You can add gradients by using advanced CSS techniques too