Are you really seeing the stripes as black??
I can kinda see a blue tint -- my assumption at first glance was that the dress is in shadow and probably is a little lighter in real life, but if it's not the case, it could be a light blue -- but I see the gold stripes as plain as day...
EDIT: Apparently Vox agrees with me: (not that that's always a good sign )
OK that looks white and gold to me but the original picture is clearly blue and black
EDIT - SO I JUST CAME BACK TO IT AND NOW EVERYTHING LOOKS WHITE AND GOLD BUT I CAN STILL SORTA SEE IT AS BLACK AND BLUE AT THE SAME TIME WTF IS WRONG WITH ME