"It's schizophrenia on a very large scale"- Lakshmi Menon in this video.
But these days, with the most powerful man in the world being black (Obama), and ethnic people being heavy hitters in all arenas of society, fashion continues to inch out. The US is probably the most tolerant. In India, the wheel is reversed. While darker skinned people are looked down upon in all other areas of life (I'm generalizing here. The educated class tends to be a bit smarter about such things), the runways are noticeably dusky.