I didn't begin to wear very bright colors while riding until I reached about 50 years of age. In the 1960's and into the 1970's, I favored gloss black, deep burgandy, and brown 10 speeds. I don't know why because I liked bright metallic blue, bright red, bright yellow, and other bright colors on bicycles with fenders and tourist bicycles.
Today I really favor the KOOL LEMON, ORANGE, and CAMPUS GREEN Schwinn colors from circa 1972 and the almost Jim Rockford Pontiac Firebird color that Schwinn was using in the mid Sixties and the VIOLET color from mid Sixties, circa 1967. YELLOW and ORANGE are favorites today because of their visibility from far away.