I'm doing this digitally, so I can't mix colors like one mixes pigment. In digital its additive mixing and pigment is subtractive mixing. I thought the colors in my first painting were too muted even for a limited palette. This time, I sampled the colors from screen shots when you were testing the colors. So I have better starting points. I've your average light, avg dark, avg dark from the 1st painting and your ketchup and mustard. Digital black and white are both pretty flat so I made a blue black and bluish white. Most of my mixing I'll do on the color picker from these starting points. Hopefully I'll come closer to the colors you're getting.