It seems that PEX prefix/sufix won't work.
Also, that'd be great to be able to select our own color for players. They're all green as well as their message.

I downloaded iChat's latest version. I am unsure if that's their experimental superperms version. Where do you get it and how did you set it up to use the prefixes etc from PEX? Thanks.

Solution: Use Chatter! It's the only chat formatting plugin I've tried that works well with SimpleClans, PermissionsEx, and my strict guidelines of chat formats. Just use +displayname instead of +name in all instances.

ChatManager config:

chat-range: 100.0
display-name-format: '' #must be blank to avoid overwriting changes made by SimpleClans, but you can't skip it or it use a default value!
global-message-format: '%prefix%1$s%suffix &e%message'
enable: true
message-format: '%prefix%1$s%suffix %message'
ranged-mode: false

SimpleClans adds the colour of %prefix on the front of the player's name, but it does not add the suffix anywhere. It is still up to ChatManager to display the suffix (which presumably contains a &f).

I read the code.

I second this. I'm using the ChatManager.jar from PermissionsEx, and it seems impossible to get the chat format
[TAG] Username:
If possible, adding a tag to ChatManager such as %tag and %clan would solve the problem.

@vortico, Do you also have the '>message' part having the same color as the username (green) ?

With ChatManager disabled, I believe the message is set to white by SimpleClans' default. With it enabled, I remember having problems with the group prefix/suffix and message color. I have since switched to iChat's experimental SuperPerms version and was able to set the format and colors to my preference.

added pex prefix suffix support