While I care about the color on my cars and I would pay a fee to get the color I want, $3K is way too much... I paid few hundred bucks in the past, but few grand is too rich for my tolerance level....
Heck, even some luxury brands charge less for premium paint/color... Sure there are some crazy numbers out there, but on $100K+ cars not $40K cars.
I think those bright (otherwise nice) colors will be very, very exclusive.