The hex color #55b91c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#AA46E3. The grayscale version is
#636363. A 20% lighter version of the original color is
#88EC4F, and Hex
#228600 is the 20% darker color. If the color is saturated by 10%, you get
#54C215. If the color is desaturated by 10%, the color
#56B023 is obtained.