Coal is described as a "matte black." It's a dark black with a mostly matte finish and neutral undertones. It had good pigmentation with a slight powderiness, but it wasn't too bad. It needs a primer to help it blend, as it tended to adhere but become very stiff to diffuse/blend out along the edges. It wore well for eight hours. See comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.