To speak to the OP's subject line, yes, once, many decades ago. A friend of mine installed a new radio in a client's Avanti and the dial light was red. The client liked the look but wanted all of the bulbs to match the radio dial. We took out the instrument cluster and dyed / painted the bulbs. I think we just got it far enough out from the dash that we could reach the bulbs. It was easy enough to do in the day.
I do not know the difficulty today, but it's not anything that I'd attempt. I like the static cling suggestion.