Blue–green distinction in language "azul-" means turquoise-blue. One can also make the distinction between "verde-claro" and "verde-escuro", meaning light and dark-green respectively, and more distinctions between several qualities of green: for instance, "verde-" means olive-green and "verde-" means emerald-green. Cyan is usually called "azul-celeste" (sky blue) or "azul-", meaning pool blue, but also less commonly "", and "verde-", meaning water green. Romanian clearly distinguishes between the colors green (') and blue ('). It also uses separate words for different hues of the same color, e.g. light blue ('), blue ("albastru"), dark-blue ("bleu-" or '), along with a word for turquoise (') and azure ('
Subtractive color the spectrum. Magenta is the complement of green, and yellow the complement of blue. Combinations of different amounts of the three can produce a wide range of colors with good saturation. In inkjet color printing and typical mass production photomechanical printing processes, a black ink K (Key) component is included, resulting in the CMYK color model. The black ink serves to cover unwanted tints in dark areas of the printed image, which result from the imperfect transparency of commercially practical CMY inks; to improve image sharpness, which tends to be degraded by imperfect registration of the three color elements; and