Desert and Zombie could both be interesting colours – or if not interesting bases then hopefully at least their clothes will be cool. Chocolate tends to be pretty good colour when the artist bothers. A well-done Speckled could be cool. Camouflage and Snow tend to be iffy. Gold and Silver tend to be shiny colourfills, though they can be done well. Relic is a bit monotonous, but might be somewhat interesting to see. Sketch lost a lot after the revamp. Biscuit could be amusing, though it seems to be a colour that is reserved for last. I think Maraquan is unlikely, but after the Baby Krawk anything is possible. Custard and Glowing are Custard and Glowing.
Thoughts? Hopes? Desires?
Faster than a speeding cheeseburger, but not by much.
I can't see Relic really working for the Koi and not just looking daft. Several of those remaining colours don't suit an aquatic pet (Biscuit, Custard). Maraquan could be interesting though I don't know what direction they'd go with it. I agree with Nogitsune - Gold, Silver and Speckled have good potential. But I'm going to take a guess that we get Camouflage and Glowing.