HP Color LaserJet CM1015CM1017 Multifunction Printer series - Manual (Page 81)

Neutral Grays
The Neutral Grays setting determines the method for creating gray colors that are used in text, graphics,
and photographs.
● Black Only generates neutral colors (grays and black) by using only black toner. This option
guarantees that neutral colors do not have a color cast.
● 4-Color generates neutral colors by combining all four colors of toner. This option produces
smoother gradients and transitions to non-neutral colors. It also produces the darkest possible
black.
ENWW Manage color options 67