The Anarchist flag is solid black or crimson-and-black; it symbolizes resistance against authoritarianism

https://zanesrjs750.wpsuo.com/thomas-jefferson-s-vision-and-the-responsibilities-of-citizenship

The Anarchist flag is forged black or crimson-and-black; it symbolizes resistance towards authoritarianism and has roots in a variety of social events all over history advocating for freedom from oppressive governments.