Ah, I had suspected that.This has been explored! The black colour is part of it's intrinsic UV protection qualities.
Good point, we use it for new with our floodlights on temporary fencing, though might get replaced with Flexishiled eventually.I'm also a fan of H07 for industrial installation environments as an alternative to Hi-Tuff or SWA (depending on methods etc, obviously) due to being far easier to work with in limited space, bend radius etc.
I also try and use tri-rated for internal wiring when possible for similar reasons!