A print guy in Tucson told me my logo colors were muddy, and he was right
About 4 years back I sent a client's logo off to a small print shop in Tucson. The owner called me up and said, real flat, "your colors look muddy on paper." I got defensive at first. I pulled the file up and yeah, my greens and grays were all sitting at the same lightness. Nothing popped. He told me to push the values apart, make one dark, one light, stop picking colors that live side by side on the brightness scale. I went back and rebuilt the whole palette, kept the same hues but spread the light and dark way out. Prints came back clean. Now I check value first, hue second, every single time. That one phone call did more for my work than any book I read. Anyone else get a piece of feedback that made you redo your whole approach to picking colors?