Burnt umber is both a pigment, and colour. The dark brown pigment is made by heating umber, a clay containing oxides of iron and manganese, and is used for oil and water colour paint.
Burnt umber gained notoriety in the movie Fargo, where it was the colour of the Cutlass Ciera that Jerry Lundegaard gave to Carl Showalter and Gaear Grimsrud when he hired them to kidnap his wife. 
In the Frasier episode The First Temptation of Daphne, Niles instructs Daphne to get a burnt sienna folder. Martin tells her it's "brown", causing her to pick up the wrong folder. Niles chastises her that the folder is "clearly" burnt umber.