Rainbow is an object that depicts 7 colors: red, orange, yellow, green, light blue, dark blue, and purple.
An animated character version appears in "Blue's Rainy Day Rainbow" and "Rainbow Puppy's Skidoo Adventure". She was voiced by Grammy Award-winning singer Meghan Trainor in "Blue's Rainy Day Rainbow" and by Stacey Kay in "Rainbow Puppy's Skidoo Adventure".