Speaking of Zenith, just about anytime that you turn on a TV these days (any brand of TV, mind you), you see commercials telling about Chromacolor. It is touted as a "totally advanced color TV system, (the) first to fully-illuminate every color dot on a jet black background."
Graphic from the Zenith Radio Corporation  

The Zenith Eakins model is one of the new Chromacolor sets currently on sale at the Anchor Department Store. With a TV such as this, one could be tuning into programs such as "Rowan & Martin's Laugh-in," "The Carole Burnette Show," "To Rome With Love," "Room 222," "Love American Style," "The High Chaparral," "Ironside," and "The Mod Squad."

Graphic from the Zenith Radio Corporation