The hex color #57a93d is a light color. The web-safe version is Hex
#669933. A complementary color is
#A856C2. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#8ADC70, and Hex
#24760A is the 20% darker color. If the color is saturated by 10%, you get
#55AF39. If the color is desaturated by 10%, the color
#59A341 is obtained.