Заменяем $USERNAME$ на
Code
<?if($GROUP_ID$='251')?><font color="#ffff00">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='255')?><font color="#808080">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='8')?><font color="#f51cd2">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='5')?><font color="#cd00cd">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='4')?><font color="#1e90ff"><u>$USERNAME$</u><font><?endif?>
<?if($GROUP_ID$='3')?><font color="#34c924">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='2')?><font color="#d8a903">$USERNAME$<font><?endif?>
<?if($GROUP_ID$='1')?><font color="#ffffff">$USERNAME$<font><?endif?>
Code
<?if($GROUP_ID$='ИД ГРУППЫ')?><font color="#ЦВЕТ НИКА">$USERNAME$<font><?endif?>
