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I remember this but I don't know where it is now (mods?) since I never used colors...

Only information I have is in text.csv:
#;8) No formatting can be done in this file. To change the color of a text, insert the following codes in front of the word:
#;§W = white text
#;§Y = orange text
#;Note that the color change will be applied to all words after the code, until the end of the line that the word is printed on. If several words should have a color change, put the code in front of each of them to be on the safe side. If only one word should have a color change, make sure to reset the color after the word.
IMHO, other colors should be a different letter than Y or W.