Mark Rothko was a 20th century Human painter on Earth known for his abstract art.
While time jumping as a result of a Krenim chronophage in 3191, Paul Stamets posited some elements of his predicament to a 2257-Jett Reno, who warned him not to bury his mind in the abstract for too long or joked he'd "turn into a Rothko painting." (DIS: "Face the Strange")
This character was only mentioned in dialogue.