ColorChat was a plugin made for this plugin request. It changes your chat color with the simple command /color
For example you may do /color &a, and they now chat in that color, or they can change it and do /color &c, and they now chat in that color.
/color (displays the message: Usage: /color <color id> )
/color <color code> : changes the color the players chat shows in to that color, so they can do /color &a and chat in light green until they change it.
/color <player> <color>: Changes the chat color of the specified player to the specified color code. Example: /color notch &a will make 'notch' chat in light green.
chatcolor.change - allows the user to change their chat color. default: op
chatcolor.others - allows the player to change other players chat color. default: op
