The hex color #99f10f is a light color. The web-safe version is Hex
#99FF00. A complementary color is
#660EF0. The grayscale version is
#888888. A 20% lighter version of the original color is
#CCFF42, and Hex
#66BE00 is the 20% darker color. If the color is saturated by 10%, you get
#9BFB03. If the color is desaturated by 10%, the color
#97E71B is obtained.