Yellow people
Yellow was a racial classification associated with a "yellow" skin color and Asian ancestry.
In 2268, First Officer/Science Officer Spock theorized that the only reasonable explanation for a once considerable civilization on the planet Omega IV to have disappeared would have been war; nuclear devastation or a bacteriological holocaust. Captain James T. Kirk remarked that the yellow civilization of Kohms was almost destroyed while the white civilization of Yangs was destroyed. (TOS: "The Omega Glory")