It doesn't support it currently. If you want to add it to the ticket list, it should be a simple enough thing to do...
I haven't tested this, but in staff/tickets.inc.php you should be able to change line 405 from this:
<tr class="<?=$class?> " id="<?=$row?>">
To this:
<tr class="<?=$class?> <?= str_replace(' ', '_', strtolower($row)) ?>" id="<?=$row?>">
And then add the CSS accordingly.
This will change it in the list of tickets. To style the actual tickeket view, you'd have to change that as well.
