Bon-Ton offers the KitchenAid 3-Piece Mixing Bowls in Yellow/Lime/Teal (pictured) for $9.97. With free shipping via coupon code "FREESHIP", that's the lowest total price we could find in any color by at least $19. This set features 2.5-, 4.5-, and 5-quart bowls. They are dishwasher-safe.
Note that they offer a similar set in Multi or Red for $9.97 with free shipping via the same code. These bowls are 2.5-, 3.5-, and 4.5-quart size.