HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 192)

192 Chapter 6 Color balance and color creation
EN
Color Density
The color density of cyan, magenta, yellow, and black can be
individually adjusted to high, medium, and low. The settings made in
Color Density mode will increase or decrease the strength of the color
in the copied image. The colors on the copied pages will have a
darker or lighter application as a result of the Color Density setting.
Figure 49 Examples of Color Density adjustments
Original
High density magenta
is increased High density cyan
is increased
Low density magenta
is increased Low density cyan
is increased