What color were the robes of kings and queens? Yes, they were purple, our most royal color that is associated with wealth, prosperity, rich sophistication. This color stimulates the brain activity used in problem solving. However, when overused in a common setting it is associated with putting on airs and being artificial. Use purple most carefully to lend an air of mystery, wisdom, and respect. Young adolescent girls are most likely to select nearly all shades of purple as their favorite color.