Brown

Brown was a colour.

The Tenth Doctor had thick brown hair and large, dark brown eyes. (TV: The Parting of the Ways, Children in Need Special) One of the two main suits he wore during this incarnation was dark brown with blue pinstripes, (TV: The Christmas Invasion)

Individuals or species the Doctor met with brown eyes included the Tactires, (COMIC: The Forgotten), Marnal (PROSE: The Gallifrey Chronicles), Jane McKillen and Dale Hicks (TV: Fear Her)