no entry overlay

Hey, I was in the middle of making a respawn room and was testing it to make sure the other teams couldn't get inside. Well, I couldn't get inside, but you can't see the no-entry brush unless you look from the side...? I don't know what's really going on here.

Just a basic color edit to the current no entry overlay in order to provide a blue version for blue spawns and a neutral one as a means to indicate one-way paths to players if all teams have access to said path. Depending on how its used will depend on how annoying or distracting it'll be to...