You can talk in game only and in single player.
Here is the colors:
,^10-^20,^20-^30,^30-^40,^40-^50,^50-^60,^60-^70,^70-^80,^80-^99
I will be posting the colors for each number.

i don't get what you are talking about

Talking with colors is talking with special colors (not black), but ingame. Example. His tutorial explains how to chat with those custom colors.

http://forum.toribash.com/showthread.php?t=56668

search next time.