An indigo-blooded being with long goat-like horns stands over a dead olive-blooded female
The rainbow eye of truth
A cyclops, fake rainbow (it has no blue or possibly indigo part).
Cyclops stickman is contemplating his existence on this planet...... Just kidding, he's looking at blue and light blue curved lines.
One-eyed alien on an asteroid looks, puzzled, at a few waves of blue in the sky.
Doodle or Die is the game of "telephone" with drawing!