I dont remember the age, but it was before Kindergarten, thought men came into the house at night to load the next days shows into the TV.
I thought black and what television was black and white because history happened in black and white. I suppose that means life in colour happened after the invention of colour tv
Tangentially related… The creation of the blue LED was so revolutionary, and took so much effort and science to make, that the guy who discovered how to make blue LEDs got a nobel prize.