The HKS is a colour system which contains 120 spot colours and 3250 tones for coated and uncoated paper. HKS is an abbreviation of three German colour manufacturers: Hostmann-Steinberg Druckfarben, Kast + Ehinger Druckfarben, and H. Schmincke & Co.
Did you know?
Chroma refers to the intensity of a color, how bright or dull it is. Scarlet and brick red are similar in value, but their intensity differs. Brick red is duller as it has a lower chroma than scarlet. Scarlet has a higher chroma so is more brilliant.