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Blue is one of the three primary colors in the RYB colors model (traditional colors theory), as well as in the RGB (additive) colors model.[2] It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet. Jacksparrowthepirate (talk) 09:51, 7 March 2024 (UTC)[reply]