If you're an admin, and your group color is red, this will find every link to your profile, and change the color of it to the color the group; in this case, it would be red. You can have multiple names colored, and in different colors.
<script>
/*Change username colors across board by Vitality of TCZ || Revolution X*/
var a = document.getElementsByTagName('a')
function changer (xid,xuser,xcolor){
for(i=0,n=a.length;i<n;i++){
if(a[i].href.match(xid) && a[i].innerHTML.match(xuser)){
a[i].style.color=xcolor
}}}
changer("u=1","Vitality","blue");
</script>
All you need to edit is that line at the bottom, right before the final script tag.
Here is the outline if you're unsure of what goes where/if you'd like to add more (for reference):
changer("u=#","USERNAME","COLOR");
Enjoy!