Double click a channel to edit it, select a color, then click Apply Color. The chat box will not refresh until a chat message is displayed, or you scroll through the chat history. If you like it, save the changes and they will be restored when you next log in. They are stored in a cookies file within the client's cache folder.
The following chat channels are default in the client:
|Default||Not sure if used.|
|Err||Not sure if used.|
|Info||Not sure if used.|
|Sys||Not sure if used.|
|ch/||Private chat channel, when using /join and /leave|
|conBlue||Unknown or no longer used.|
|conBrightGreen||Unknown or no longer used.|
|conBrightPurple||Unknown or no longer used.|
|conDarkGreen||Unknown or no longer used.|
|conGrey||Unknown or no longer used.|
|conLightGreen||Unknown or no longer used.|
|conOrange||Unknown or no longer used.|
|conPurple||Unknown or no longer used.|
|conRed||Unknown or no longer used.|
|conWhite||Unknown or no longer used.|
|conYellow||Unknown or no longer used.|
|emote||Text is converted to emotes and not visible.|
|err/||Standard red error message.|
|friends||Blue friend login/logout and status notification.|
|mci||My incoming damage.|
|mco||My outgoing damage.|
|oci||Other player incoming damage.|
|oco||Other player outgoing damage.|
|party||Standard blue [Party] chat.|
|rc/||Standard gray [Region] chat.|
|s||Local /say chat.|
|sys/||Yellow system information messages.|
|t/||Incoming [Tell] message.|
|yt/||Outgoing "you tell" message.|
Some messages come across with other information embedded into the channel name. In these cases it is possible to customize colors for specific things.
To utilize these custom colorings, instead of double-clicking a channel in the list, type a new one into the input box, select a color, then click Apply Color. A new channel entry will be added to the list.
Custom coloring of all private chat channel messages in the channel named "test". Other channels are not affected.
Custom coloring for incoming /tell messages from the character name "Some Player". The quotation marks are required. Incoming /tell messages by other players are not affected.
Custom coloring for outgoing /tell messages to the character name "Some Player". In contrast to above, quotation marks are not used. Outgoing /tell messages to other players are not affected.