The hex color #56b51e is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#A94AE1. The grayscale version is
#636363. A 20% lighter version of the original color is
#89E851, and Hex
#238200 is the 20% darker color. If the color is saturated by 10%, you get
#55BD17. If the color is desaturated by 10%, the color
#57AD25 is obtained.