People can have defined colours. To pick your one, edit this page. Then, when it comes to writing, just type:
%yourname%This is my wonderful contribution! --{{~yourname}}%%
which looks like:
This is my wonderful contribution! --Robin
or perhaps:
%yourname%This for in character --{{Serlo}}%%
which becomes something like:
What do you mean by 'in character'? --Serlo
Ummm. I like red. --Ravenmane
Follow this link to edit the SideBar.