Is it normal to have Dark colored veins on scrotum?

Hi I'm 18 male I have dark colored veins on my scrotum I was a afraid it was varicocele but I don't know cause varicoele is dark colored veins on the inside of the scrodum and is the veins connected to the testies but this is like on my scrotum skin I have no pain or anything I just noticed it the other day and couldn't and didn't really know it it was normal or not thanks