Beer geek here, that's search term issues. If you're wanting traditional "beer colors" but not colors from logos and parties, try "malted barley" for an average yellow-orange beer color gamut, and "chinook hops" (a specific variety) for the greens you might expect.
Personally, I'll use this for color schemes.
Check out http://colorapi.com/#!q/plumb%20tree , http://colorapi.com/#!q/iceland , http://colorapi.com/#!q/alps , http://colorapi.com/#!q/rainforest .