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 ('
Shades of blue system are the three colors of light chosen such as to provide the maximum gamut of colors that are capable of being represented on a computer or television set. This color is also called color wheel blue. It is at precisely 240 degrees on the HSV color wheel, also known as the . It is a spectral color which lies at, or near, the short-wave (violet) end of the traditional "blue" and possibly was classified as "indigo" by Newton. Its complementary color is yellow. The color defined as "blue" in the CMYK color system used in printing, also known as