OK before the expansion, I never had an issue getting colors like black or white. White might take 10 to 15 attempts, black on the other hand took 1 to maybe 5 tries.
Now, after the expansion, 500 random pigments and all I have gotten are **** colors like purple, pink, light blue, dark blue, nasty greens, yellows, and tans. I used a lot of event gold and real gold and not one black, not even dark gray. If I wanted to taste the rainbow I would eat a bag of Skittles