#ChallengeAccepted: Why Women are Posting Black and White Photos

You may have noticed social media trend that's meant to promote female empowerment has filled Instagram feeds recently with black-and-white selfies.

For the #ChallengeAccepted trend, a person nominates their friends to share a black-and-white photo on Instagram, often with the caption "Challenge accepted." 

As of Tuesday evening, there have been more than 5 million posts with the hashtag #ChallengeAccepted. A lot of the posts have also included encouraging messages to other women along with the hashtag #Womensupportingwomen. 

The hashtag #ChallengeAccepted trend popped up on social media as early as 2016, alongside black-and-white selfies to spread cancer awareness. An Instagram representative told the New York Timesthat the earliest post the company could find from this latest round of "Challenge Accepted" photos was posted on July 17 byBrazilian journalist Ana Paula Padrao.

Many celebrities, including Jennifer Aniston,Kerry Washington and Ava DuVernay have taken part in this latest rendition of the challenge.