The hex color #55d81c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#AA27E3. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#88FF4F, and Hex
#22A500 is the 20% darker color. If the color is saturated by 10%, you get
#53E314. If the color is desaturated by 10%, the color
#57CD24 is obtained.