How do Modern African American Artists Convey Their Thoughts on Racism?

After analyzing the painting Officer of the Hussars, by Kehinde Wiley, I was interested in finding out his artistic purpose.  I learned that he "engages the ... visual rhetoric of the heroic, powerful, majestic and the sublime in his representation of urban, black and brown men found throughout the world" (Kehinde Wiley).  Kehinde's enthralling paintings made me wonder how other modern African American artists convey their thoughts on racism.  After some research, I found out that Glenn Ligon, a conceptual artist, explores the impact of language and gender on racism.  
Glenn Ligon has created many famous works, such as We're Black and We're Strong.  

We're Black and We're Strong by Glenn Ligon

Ligon has had many art exhibitions.  One of his more momentous exhibitions was "America", at the Whitney Museum of American Art in New York.  "America" explores "American history, literature, and society across a body of work that builds critically on the legacies of modern painting and more recent conceptual art" (Whitney).  An interesting piece there is Sun (Version 2) #1.  

Sun (Version 2) #1 by Glenn Ligon

In this, Ligon uses multiple colors, predominantly black, in order to scorn the racism that was taught to children.  The school that is colored black signifies the segregation of schools, where white children were taught in white schools and colored children were taught in colored schools.  The people in the lower left corner are scribbled over with black, indicating that children were taught that colored people were not accepted by society.  The word "shades" in the upper left corner is blackened to suggest that all colored races were treated like how blacks were.  Also, by adding (Version 2) to the title, Ligon conveys that there were "two suns", one for whites and one for colored people.