The hex color #81b45a is a light color. The web-safe version is Hex
#99CC66. A complementary color is
#7E4BA5. The grayscale version is
#858585. A 20% lighter version of the original color is
#B4E78D, and Hex
#4E8127 is the 20% darker color. If the color is saturated by 10%, you get
#81B956. If the color is desaturated by 10%, the color
#81AF5E is obtained.