Then again you should see the amount of color gold watch we buy. I always wonder why? Yellow gold with white dial ... hmmm ...
Of course there's also a lot of white metal black dial sport watch went flying off the counter as soon as they arrive at the store.
Don't forget the mother of pearl, enamel, blue dial, cream dial, grey dial are also quite popular here in asia.
I think maybe the weather is main factor :P
Regards
Tyler