Definition of Subtractive colors:
In four-color printing process, the CMYK colors (Cyan, Magenta, Yellow, and blacK) which are overlapped in various combinations and proportions to produce all other colors. The visible color is the reflected (and not the retained) color, and is called subtractive because its wavelength is less than sum of the wavelengths of its constituting colors. See also additive colors.
Meaning of Subtractive colors & Subtractive colors Definition