I... don´t think that there are colour code rules in the manual.
The books usually say that you can choose the colour when you use dancing lights, faerie fire, etc.
Right, I simply meant to point out that in some video games, colour coding is used as a practical convenience to help you identify one thing from another.
It's probably less helpful in TB that RT gameplay, and might give you an advantage that you wouldn't have in the PnP game, so it's not necessarily the right thing to do.
But, it's worth remembering that even the "simplified" 5e rules are a great deal more complex for the player than most video games; helpful features that do not significantly contradict canon can increase the appeal of the game, and how it reviews.
