Some people have fucked up eyes, i can understand how someone can see the "white" part blue since it has a shade of blue but how the hell can you see the gold part black?
The blue is consistently blue all the way through, and very blue compared to the white background in the top right and down the right side.
The other colour is brown at the top getting closer to black as you go down.
If you have to make a call between white/gold and blue/black it is blue/black because there is no white in the dress.