The hex color #81c65b is a light color. The web-safe version is Hex
#99CC66. A complementary color is
#7E39A4. The grayscale version is
#8B8B8B. A 20% lighter version of the original color is
#B4F98E, and Hex
#4E9328 is the 20% darker color. If the color is saturated by 10%, you get
#80CC56. If the color is desaturated by 10%, the color
#82C060 is obtained.