This: https://user-images.githubusercontent.com/23437045/33275828-c96e8810-d3a4-11e7-9e36-f8fed85b6203.png
That's what QuickLook shows:
This is what Preview shows:
This is what Firefox shows (ignore the borders):
What color is that PNG?
Is this another "blue-black white-gold dress mystery"?
BONUS: This is what your browser shows