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Here's Why Your Facebook Friends Are Turning Purple

02/05/2014 09:57 am ET

If your friends' Facebook profile pictures have turned purple, your vision isn't failing you. They've changed color for a good cause.

Chevrolet is encouraging people to turn their profile pictures purple in support of World Cancer Day, which was Tuesday.

For every person that makes their profile picture purple, the car company will donate $1 to the American Cancer Society, pledging to give up to $1 million. Chevy already shelled out a lot of money for a TV spot promoting World Cancer Day that aired during the Super Bowl.

Chevy's website has a tool where you can tint your profile pic. Here's what the purple pictures look like:

purple facebook

Over the past few years, the Facebook profile picture has become a venue for showing support for various social causes. Last March, millions of people changed their profile pics to a red equals sign in support of marriage equality as the Supreme Court heard a case regarding gay marriage. Facebook engineers noticed a huge spike in people changing their profile pics that week.

Earlier on HuffPost:

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