When I first saw the pic it was clearly blue/black. I laughed out loud when my wife asked me about the white/gold dress. I showed her my phone, and she agreed she could kinda see the blue black. She showed me hers, and I could kinda make out the white gold.

The device you view it on matters, and the lighting around you. For a while I could switch between them with concentration.

This pic is obviously white/gold.