Color Blending Mode
I'm unsure why the color blend mode isn't already a thing in the blending modes for CA. It is extremely useful. If there is a true technical reason why it isn't added or can't be added, then I would love to know, it sounds like an interesting thing to leave out. It may also just be a mistake, and it got left out when programing it.
Anyway, I hope the best for the program, I'm having so much fun creating, and pushing it to its limits.