octoroon vs. mulatto

noun

Older Use: Offensive.
  1. a person having one-eighth Black ancestry, with one Black great-grandparent; the offspring of a quadroon and a white person.

noun

plural

mulattoes, mulattos 
  1. Anthropology.,  (not in technical use) the offspring of one white parent and one Black parent.

  2. Older Use: Offensive.,  a person who has both Black and white ancestors.

adjective

  1. of a light-brown color.