The hex color #99a99e is a light color. The web-safe version is Hex
#999999. A complementary color is
#665661. The grayscale version is
#A0A0A0. A 20% lighter version of the original color is
#CCDCD1, and Hex
#66766B is the 20% darker color. If the color is saturated by 10%, you get
#98AA9E. If the color is desaturated by 10%, the color
#9AA89E is obtained.