Today’s photography word is:
CMYK – is a subtractive color mode used in color printing. The name comes from the ink colors use in the process, cyan, magenta, yellow and key (black). The key is the part of printing that enhances the details in the image. The other three colors are aligned to the key or key plate.
I know this is a little geeky but just think of it a subtracting brightness (white) to create the image.