While it might seem like a good idea to paint light switches to match the walls, doing so can actually cause some problems. First, paint can make it more difficult to see the switch, making it harder to find in the dark. Second, paint can make it more difficult to tell if the switch is in the on or off position. Third, paint can chip and flake off over time, making the switch more difficult to operate. For these reasons, it's generally best to avoid painting light switches.