Question about ticket appearance

Hello List,

We would like to be able to tell which comments in the tickets are ours, and
which comments come from customers - just by looking at the comment. As
sometimes comments and replies can become very wordy, it would be nice to be
able to jump right to customer issues in order to handle them more quickly.
Is there any significance to the blue/green/grey/white/red color scheme on
the tickets? If not is there a way to change how the text appears (font,
color, format), or the cell background color, dependant upon which link
(Reply, Comment) is clicked? Does RT support this? Please advise.