OK, since this has been requested lately over and over by users, we've enabled Forum Paid Subscriptions, which allow users to change their forum username color for a small monthly fee.
You can check all available color options here:
http://forum.twilightmuonline.com/payments.php
(we will be adding more options later on)
The payments have nothing to do with the game donations, so you will not receive TC for these subscriptions, they are in place just for the username color change.
If you have any questions don't hesitate to ask in Q&A Section of the forum.