Member of the Trade: Chord Electronics
- Apr 1, 2014
What makes the most sense to me using red as a low volume colour has to do with the visible light spectrum. Red is low energy and relatively harmless. Blue/purple/ultraviolet is very high energy and very harmful.
That's exactly the idea, but with black at the bottom and white at the top. I am guilty of forgetting that something that seems obvious to someone educated in physics may be less obvious to others! But its easy once you get the hang of it.