Ok, now please indulge me while I go full art school science geek...
Sisi, Diane, thanks for confirming that. It makes a certain logical sense that our eyes would fix on these harmonies when we see colour combinations, but the relationships between them are complex and there are many factors at work.
Staysfit, I'd love to see some of your DD's work. I was in The Hague yesterday for an exhibition by Op-art painter Bridget Riley. Her works are filled with optical effects and illusions that challenge our perception. The exhibit gave a fascinating insight into the way she uses colour theory and geometry to generate an optical response. Her methods are very technical and rooted in science but the impact is pure visual poetry.
They used this quote from her in the show:
"Sensation of colour is a different thing, it takes in attendant qualities so to speak, such as glitter and sombreness, buoyancy or weight, dull glow or full brilliance, impalpability or density, softness or hardness - in short, a surprising variety of sensual relationships."
Janet: those are really beautiful. They'd make amazing textiles. Are you going to print them?