What's Up with Black Caps on Bicycle Tubes?

For a pretty price you can order all kinds of interesting Schrader and Presta caps.
Most of these are courtesy of Amazon, in case any in this collection appeal to you.
A hula girl on your bike, perhaps?

It's inevitable that whenever I pump a tire or change a tube I misplace the black valve stem cap. The cap is camouflaged on asphalt or, in the case of on the road repair, lost among grass. I'm often in a panic, running late for an appointment so I extract the stand up pump (heaven forbid I leave without adequate air pressure!), unscrew the cap, toss it on the garage floor, and quickly inflate my tires. It's no wonder caps are lost.

I understand why tubes are black. But could suppliers provide colored caps? They wouldn't have to match between wheels, just be offered in another color, not black or grey. And, for that matter, would you pay extra—presuming colors cost more to manufacture—for this option? I'd gladly pay 50 cents more per tube to keep caps on my bicycles.