LOS ANGELES (CBSLA.com) — White and gold, blue and gold … or blue and black?

That seemed to be the operative question on sites like Twitter, Facebook and Tumblr on Thursday night, where messages poured in over the color of this dress.

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Even Taylor Swift weighed in on what she’s calling the “odd dress debate” and said “it’s obviously blue and black.”

Other stars who weighed in include Amy Purdy, Maria Menounos, Kyle Richards and Anna Kendrick.

It turns out the dress is actually blue and black. A Washington neuroscientist said the picture is one of the biggest sight differences he’s ever seen.

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What did you think?