The hex color #99c93c is a light color. The web-safe version is Hex
#99CC33. A complementary color is
#6636C3. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#CCFC6F, and Hex
#669609 is the 20% darker color. If the color is saturated by 10%, you get
#9BCF34. If the color is desaturated by 10%, the color
#98C344 is obtained.