Green’s Dictionary of Slang

1. (US black) a light-skinned individual.

1940		D. Burley N.Y. Amsterdam News 7 Dec. 20: Imagine a duo of ‘beige’ chicks bringing Georgia to mayfair.
1946		D. Burley N.Y. Amsterdam News 11 May 19: Uncle is eye-balling the beige chick.

2. (US) deeply tedious, very bland [the perceived blandness of the colour beige].

1948		Dan Burley ‘Back Door Stuff’ 30 Oct. [synd. col.] That midtown beige king of the chicks has gone underground.
1983		Eble Campus Sl. Mar. 1: beige – ordinary, plain, drab, dull.
1989		P. Munro Sl. U. 34: My date talked about his stamp collection the whole night. What a beige personality!
2002		‘Valley Girls’ on Paranoiafanzine 🌐 I’m sure that there must be just, like, a million marvs there, like, totally beige dudes.