A completely black image used as the header graphic on a Facebook profile page is often chosen for its stark simplicity. Its absence of color and imagery directs visual attention elsewhere on the profile. An individual might upload such an image to convey mourning, solidarity, or simply to create a minimalist aesthetic.
Employing a design of this nature can serve several purposes. It can denote a period of reflection or support for a cause. Historically, the adoption of such visuals in online spaces has frequently signaled collective awareness or symbolic participation in movements and moments of significance. The effect is a visual declaration achieved through understatement.