blueness

blueness (In French dominante bleue) in the sense of opponent color theory, the hues in the blue area opposite to the yellow hues; representation as color space coordinates: b*<0 (CIELAB) and v’<0 (CIELUV). Each change in proportion in the printing of the process colors CMYK leads to a change in blueness, so that the color that is responsible can only be detected technically and not visually; C, M and K increase B in different spectral ways. To this extent, unprofessional customer requirements within the framework of printing releases to the printing press, such as “a little more magenta and a little less yellow” lead to unpredictable changes in blueness; see also yellowness, greenness, redness.