"And another infortunate constraint for the color-picking is the spectrum of what-could-be-printed well (with low-budget printing).
So, a lot of "hot colors", no greens, and very clear blues."
AMAZING. I used to work with high-end printers dealing with color, absorption and how different paper stock causes different colors (CMYK vs RGB) etc. You're the first person to come back with coherent knowledge about that - Kudos to you :)
Seeing all the colors with the different backgrounds makes everything clear now - it looks very crisp and clear :) I like it a lot...