UPDATE: Here is the story so far. I want black, so I tried the Slate Gray combination on the spreadsheet, which gave me Plum Purple. So, I fed my chocobo 1 Xelphatol Apple, 1 O'Ghomoro Berry, and 4 Mamook Pear and now I have Mole Brown. I guess that is closer to black? So, this morning I fed my chocobo 3 Mamook Pears, 2 Xelphatol Apples, and 2 O'Ghomoro Berries. I got the color change msg on the second apple and the second berry, no message on the pears. We will see... With my luck, the message appearing on red and blue probably means it will go back to purple or something.