Farby

White (color)
(feminine noun, singular) 
examples: biely sneh, biela múka, biele víno

Black (color) 
(feminine noun, singular) 
examples: čierna káva, čierny chlieb

Red (color)
(feminine noun, singular)
examples: červená ruža, červené líca, červené víno

Blue (color)
(feminine noun, singular) 
examples: modrá obloha, modré more

Yellow (color)
(feminine noun, singular) 

Note that the middle traffic light color is called "žltá" in Slovak!

Green (color)
(feminine noun, singular) 
examples: zelená tráva,

Gray (color)
(feminine noun, singular) 
examples: sivé vlasy

Brown (color)
(feminine noun, singular) 
examples: hnedý cukor