They looked a grey colour in the picture but might be black- not sure as it could be due to the lighting.
Madbull have stopped making .4s in tan now too so I think it's pretty much dark colours only without looking abroad or something. Will give them ago this weekend anyway- i never had issues seeing my old madbull dark green .36s in woodland so fingers crossed I'll be ok.
I noticed MadBull's are silvery-grey, and heard the Guarder's were changing from tan too, to comply with laws or something or other. I found some King Arms ones in the UK that are tan, so may get a pot of those before they sell out and become rarer.