What color is this dress?

[DemPGH]

It's clearly white and gold. I think this is probably a lighting or possibly monitor issue. Since color has to do with wavelength, I suppose it's possible that it could appear to change colors or whatnot or look different if the wavelength is at a boundary or if lighting is changed. 

[DemPGH]

I know it's getting silly at this point, but the only possible way that anyone could convince me that that is not milk-white is to show it to me in person. That ain't blue. There may be a blue version of the dress or there may be some optical illusion at play that does not fool some peoples' eyes, but that is as white as a white rose.

I guess if people think the great deal of light in the picture is causing blue to turn white for some folks, that could be tested using a blue shirt or whatever.