Blue-black or white gold?

Blue black or white gold?

Spoiler: It’s blue – black.

If you’ve been on the internet over the past few days you have no doubt seen the offending dress – and developed an opinion on what colour it is.

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So why the confusion over such a simple dress?

It comes back the way your brain processes light – when light enters your eyes it passes through a lens, with different wavelengths corresponding to different ...

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