The vast majority of chenille bedspreads were tufted onto a white sheet but the tufts ran through all the colors of the rainbow. Often these colors were pastel in shade but not always. An exception to this rule were Hofmann spreads which were known for having white tufts on a richly dyed bedspread.
Pink was probably one of the colors most often used for chenille tufts, followed by blue and yellow though any chenille bedspread is likely to have a number of different colors.
The George and Martha Washington style was all white using the hobnail form of tufting.
Looking for a specific color? See these multiple color options in vintage chenille bedspreads: