Those who was a part of the beta might remember that you were able to color your chat messages back then. That was fixed.
But i have found a workaround.
Here is a example of a workaround that allow you to post colored text in the chat.
Try copy paste this in to your chat:
Code:
|HAchievmt:1-1-1|h{icon:gold}{c:FFFF00FF}UnknOwned Wins!{/c}{icon:gold}|h
You can also use this to spoof item names (you can click the link it in chat):
Code:
|HItem:2,-629520052:761645351:1616088369,1925559161:-1:0:-1:-1:-1:6:620:620:0:0:9:0:|h[{c:FFFF00FF}UnknOwned's Banbone{/c}]|h
There is alot more you can do with this.
(if anyone from Blizzard see this, there is a quite hefty security flaw related to this, see #HURL# and fix it before people start abusing it.)