Because the white ones always get dirty.
Why do white elephants float in the river upside-down?
Answer: To keep their blue tennis shoes from getting wet.
thanks to ellie vanhoutte for great image———————————————————-
The Royal Thibaw, Golden-footed Lord of the White Elephant, Master of a Thousand Gold Umbrellas, Owner of the Royal Peacocks, Lord of the Sea and of the World, Whose face is like the Sun.