Rainbow Brite was an animated television series introduced by Hallmark in 1984. The Rainbow Brite franchise generated $1 billion in retail sales of dolls, toys and other licensed products throughout the 80's. In the franchise's backstory, a little orphan girl named Wisp is taken by a Sphere of Light to a land without color. She rescues the seven Color Kids (one for each color of the rainbow) and finds the Color Belt, which is the tool she needs to bring color to the land. After using the Color Belt to defeat the Dark One, the Sphere of Light tells her she will now be known as Rainbow Brite. She and the Color Kids (and their helpers, the Sprites) live in Rainbowland and are in charge of all the colors on Earth.
The Color Belt needs colored Star Sprinkles to work. Each Color Kid is in charge of his/her respective color, and their Sprites mine Color Crystals from the Color Caves, which are turned into Star Sprinkles by a process much like using cookie cutters.
The movie Rainbow Brite and the Star Stealer, made in 1985, added a magical planet of light named Spectra, which is also called the diamond planet. All the light in the universe must pass through Spectra before coming to earth. The Dark Princess causes problems when she tries to wrap ropes around Spectra (in order to haul the giant diamond to her palace), which blocks out the light and throws Earth into a permanent winter.