Shades of magenta yellow and cyan, constitute the three subtractive primary colors of pigment. (The secondary colors of pigment are blue, green, and red.) As such, the CMYK printing process was invented in the 1890s, when newspapers began to publish color comic strips. Process magenta is not an RGB color, and there is no fixed conversion from CMYK primaries to RGB. Different formulations are used for printer's ink, so there can be variations in the printed color that is pure magenta ink. A typical formulation of "process magenta" is shown in the color box at right. The source of the color shown at
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