The hex color #81ee5c is a light color. The web-safe version is Hex
#99FF66. A complementary color is
#7E11A3. The grayscale version is
#999999. A 20% lighter version of the original color is
#B4FF8F, and Hex
#4EBB29 is the 20% darker color. If the color is saturated by 10%, you get
#7FF756. If the color is desaturated by 10%, the color
#83E662 is obtained.