I did just find this in Google:

Quote - A fact everyone buying a monitor ought to be aware of: There is a LARGE discrepancy between monitors that can display 16.2 million colors (also often stated as "more than 16 million colors") and those that are able to display 16.7 million colors. It does not seem it should matter much, but it does. The 16.2 million color monitors arrive at that color depth only by dithering. The 16.7 million color monitors possess the ability to display this number of colors without dithering.

So does that help you?

PS:  Definition of "Dithering"

Dithering
A method for simulating many colors or shades of gray with only a few. A limited number of same-colored pixels located close together is seen as a new color.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi