A gray chameleon crawls out of one of the dechromatized paintings. He turns to you. "You've gotta do something! Quick--help me get my color back!"

"How?" you ask him.

"That infernal machine drained my color. It can give me back my color!"

"Here's the control panel. We've got to open it! One of these color wheels must be the button to open the panel--but which one? Which button is the correct color wheel?"