The hex color #99977c is a light color. The web-safe version is Hex
#999966. A complementary color is
#666883. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#CCCAAF, and Hex
#666449 is the 20% darker color. If the color is saturated by 10%, you get
#9A987A. If the color is desaturated by 10%, the color
#98967E is obtained.