Tin hat time...
Please don't get me started on Korda Kra...
Seriously for years I used black tulip beads, black run rings, although now I'm using khaki coloured run rings. My leads are a flecked green, or brown, or grey, my hooklink swivels are black, although I must insist that some tackle manufacturer makes me a khaki green and brown flecked swivel...
You think how many carp were caught on John Roberts rig beads, stiff tubing and uncoated leads, with a length of black Dacron and a bright shiny Drennan Super Specialist hook.