If you believe the story told by someone who claimed to know him in the documentary about him, Leon Theremin invented a form of closed-circuit color television in the 1920s.
Yeah, I mean you could "well actually" my comment because a couple images had been transmitted over RF by then. But in the sense of "could this random 3 year old have learned about the Titanic from the 11 o'clock news?" it didn't exist.
My sister once asked my dad why old tv shows were in black and white and he told her it was because people used to not be able to see in color. He then told her that his mom couldn't see colors and it made my sister really sad for our grandmother.