Is there any possible to take a color video?

[Miso Kim]

Obstruse, Very nice work!
Is there any possibility to make a color rather then gray?
Is it impossible or difficult as your opinion?

Thank you in advance.

[obstruse]

Difficult to do with composite video, since you need to modulate a 3.58 MHz color carrier. Here it's done on an ESP32:
https://bitluni.net/esp32-color-pal
https://github.com/marciot/ESP32CompositeColorVideo

Easier to do with VGA. Various methods available, this outputs RGB555:
https://picockpit.com/raspberry-pi/raspberry-pi-pico-video-output/
https://github.com/raspberrypi/pico-playground

Then there's DVI, which pushes the limits of the Pico:
https://github.com/Wren6991/picodvi

But none of them can actually do 8-bit gray :)