Color doesn't matter on zoomie modern bikes. Now C&V is different.
BITD, tire sidewalls distinguished between European/Japanese lugged frame derailleur equipped bikes and cheap department store gas pipe clunkers.
We stocked 20-30 different sizes of clinchers from 12" to the 28" x 1 1/2" beasts used on Raleigh DL-1 and similar rod braked bikes.
Once we got in some "Di Yung" brand 26" Korean made tires. How appropriate!
I have black sidewall tires on several of my bikes that came with them. Since they're riders and not for show plus the tires ride nice, I haven't changed them.
verktyg