The hex color #99e62d is a light color. The web-safe version is Hex
#99FF33. A complementary color is
#6619D2. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#CCFF60, and Hex
#66B300 is the 20% darker color. If the color is saturated by 10%, you get
#9AEF23. If the color is desaturated by 10%, the color
#98DD37 is obtained.