can u dye black skinnies black agen???...cuz they've faded in tha washin machine :(

xin chào hey,i now it sounds stupid,but mi skinnies used 2 b black,an now they look kinda grey,tho i <3 thm,it jst boring if they both look the same colour

so do u no if i can do anythin about it??thnx x =D