This article considers the influential work of Ana Mendieta. Focusing on her siluetas series, Muñoz describes Mendieta's art as performing a modality of brownness that leaves resonant indentions on the world, what he calls vital materialist after-burns. Mendieta's after-burns are read alongside the poet's of Négritude and their investment in a critical élan vital that speaks to the historical precariousness of dispossessed people. The artist's work is explained as a meditation on a critical brownness that is theorized as the sharing out of the unshareable, the invaluable and the incalculable. Mendieta's intervention is ultimately described as the work of offering a brown sense of the world in which singularities flow into a politically enabling common.