(CNN) People on social media are turning their profile pictures blue to stand in solidarity with Sudan and bring awareness to the uprising that is currently sweeping the north African country.

This began after Mohamed Hashim Mattar, 26, was allegedly shot dead by the Sudanese paramilitary Rapid Support Forces during a crackdown on protesters in the country's capital, Khartoum, on June 3.

Mattar's favorite color, blue, was used on all his social profiles, and his friends and family put up this color on their profiles to honor his death.

Those who are taking part in spreading #BlueForSudan. The color blue came from a warm hearted, martyrs known as, Mohammed Hashim Mattar, my cousin who has passed away on the 3rd of June, as he was standing proud. Blue was his fav color, which now presents unity.🇸🇩



Mattar's Blue pic.twitter.com/MdZ7f2sLwS — OmerYousiff (@OmerYousifff) June 12, 2019

It soon spread among social media users who used the color not only to honor Mattar but other martyrs of the Sudan uprising.

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