I'm not sure if this will help anyone who is stuck in the colour loop on their attempt to get Soot Black but it appears that "AttacKat" has revised the RGB numbers on the spreadsheet we've been using:
http://forum.square-enix.com/ffxiv/t...=1#post2383813
It's possible doing the math using these new values and adjusting fruit could push the colour looper's into Soot Black; haven't tried this personally though. FOR SCIENCE!