Rainbows have either six colors, or infinite colors. Not seven.

If you count indigo, you also have to count red-orange, yellow-orange, yellow-green, blue-green, and violet-red, and that makes twelve colors.

EDIT: I let it slide with the Lantern Corps because they did something awesome with it.

Rainbows have either six colors, or infinite colors. Not seven.

If you count indigo, you also have to count red-orange, yellow-orange, yellow-green, blue-green, and violet-red, and that makes twelve colors.