Simplify the following text for a Grade 9 native English-speaking person.
Original: In the subtractive model , adding white to a color , whether by using less colorant or by mixing in a reflective white pigment such as zinc oxide , does not change the colorâ s hue but does reduce its saturation .
Simplified: In the subtractive model , adding white to a color does not ( in theory ) change its hue but does reduce its saturation .