Primary color overlaid partially absorbing materials on a reflecting or transparent surface. Each layer partially absorbs some wavelengths of light from the illumination spectrum while letting others pass through multiplicatively, resulting in a colored appearance. Overlapping layers of ink in printing mix subtractively over reflecting white paper in this way to generate photorealistic color images. The typical number of inks in such a printing process ranges from 3 to 6 (e.g., CMYK process, Pantone hexachrome). In general, using fewer inks as primaries results in more economical printing but using more may result in better color reproduction. Cyan, magenta, and yellow are good
Blue–green distinction in language in classical Hebrew, can mean both green and yellow, giving rise to such expressions as (pronounced ), "leek green", to specify green to the exclusion of yellow. Like Russian and Italian, Hebrew has a separate name for light blue (, "t'khelet")—the color of the sky and of fringes on the ritual garment "Tzitzit". This color has special symbolic significance in Judaism and Jewish culture. Albanian has two major words for "blue": "kaltër" refers to a light blue, such as that of the sky, but it is derived from Vulgar Latin "calthinus", itself derived from "caltha", a loan from Ancient Greek