Most comon color customer’s paint there house
Light colors are by far the most popular for residential use, interior and exterior. Thus when paint gets on a painters clothes it dose not show up as well as it would on dark color clothes.
The reason why white is worn by painters goes back to when houses were white washed with lime and water, both outside and inside houses, white coveralls were used so when you spilled it on them it could not be seen, the same reason why mechanics wore black coveralls.
I’ve been a painter for 37 years and the real reason I was told in the beginning is because you want to present a clean appearance. Now it’s just a uniform to most, Instead of wearing a rag in the hammer loop to wipe your brush handle or hands many simply wipe them on their pants. So I guess a lot of guys don’t really care about their appearance.