For the shoes I initially see pink and white. For the dress I initially see white and gold. But, I can see each both ways.

Try this exercise - instead of looking at the image in clear focus, sit back a litttle, 'defocus' your eyes so that instead of staring directly at the image you are 'gazing' softly at it. When I try this I can see the colours shift.

Gazing in an old energetic practice, normally done in meditation or between 2 people.

Cheers!