Karen, I have used Durenamel resin on many pieces, and the folks at
Rio Grande say that Colores colors work in the same way (it’s just
the hardener that’s different). Based on that, you should be able to
mix every desirable color from red, yellow, blue, white, and black.
For a few Durenamel pieces I’ve done, this has been the fun part!
Just remember your color theory, and good luck