Grey/blue moustache discoloration of upper lip after lip fillers and removing them with hyalase. (Photos)

I got a dark grey looking mustache discoloration on my whole upper lip after getting lip fillers 2 weeks ago which i didn't have before The area above my lip didn't swell or bruise at all. I got my fillers removed after 1,5 week because the filler was placed too superfiscial, but yet i'm walking around with a dark stained lip now for 2 weeks. What could it be? Photos show my lips now, after removing the lip filler.