starious:

It’s very simple to change the default selection colour. To make this effect you only use CSS. Currently FireFox, Safari, Chrome and Opera support the effect. The browsers that don’t support it simply ignore the code.

You just need to paste this code in your CSS:

::selection {
background: #HEX selection color;
color: #HEX font color;
}

::-moz-selection {
background: #HEX selection color;
color: #HEX font color;
}

::-webkit-selection {
background: #HEX selection color;
color: #HEX font color;
}

And change the colors! The three codes are the same, just different syntax for different browsers.

• SOURCE: DESIGN JUICES