Even that's probably not completely correct. If you want to blend in with what's behind you, you should look similar to what's behind you. The rules for this do

Even that's probably not completely correct. If you want to blend in with what's behind you, you should look similar to what's behind you. The rules for this don't change much at night - in dim light or bright light, you still don't want to be a strikingly different shade to your surroundings!