We also use this category for poems that reference mixed-race or multiracial people, such as W.E.B. DuBois' poem "The Quadroon," Georgia Douglas Johnson's "The Octoroon" or Rosalie Jonas' "The Quadroon's Ball." Some poems use the term 'mulatto' to describe mixed race people; this term is now of course archaic and might be considered offensive, but it was widely used during this historical period.
In the poems linked below, some use the "tragic mulatto" trope, where the true nature of a person's mixed heritage might be a secret liability; the "tragic mulatto" is of course also a well-known trope in fiction from this period. Other poems below are more celebratory and proud (see Joseph S. Cotter's "The Mulatto To His Critics" for an instance of a proud 'mulatto' poem).