The hex color #99a11f is a light color. The web-safe version is Hex
#999933. A complementary color is
#665EE0. The grayscale version is
#737373. A 20% lighter version of the original color is
#CCD452, and Hex
#666E00 is the 20% darker color. If the color is saturated by 10%, you get
#9DA617. If the color is desaturated by 10%, the color
#959C27 is obtained.