Every day when I'm driving down the freeway I see champagnes colored cars on the road. My sister just bought a champagne colored Lexus SUV. I don't think that color is unpopular in the USA.
Champaign was popular in the 90's. Tons of Lexus cars were champaign during that time. My friend had a champaign Lexus SUV, I think its their staple color for that car.