Saturation Key/Saturation Contrast

10.       (A) Saturation Key: Hues may vary in this strategy, but all colors must have the same or very   similar saturations.

Anderson, Chris J. Fortress in the mountian wastelands. Digital image. Conceptart. 

VBulletin Solutions, Inc., 2012. Web. 11 Dec. 2012.

This is saturation key because all the colors have the same or very   similar saturations.

(B) Saturation Contrast: Hues may vary but all colors must have significant contrast of saturation.

Gamecubepad. Uncharted 2 game shot. Digital image. Gamespot. CBS Interactive Inc, 2012. Web. 11 Dec. 2012

This is  saturation contrast because the colors have significant contrast of saturation.