The hex color #77c72c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#8838D3. The grayscale version is
#797979. A 20% lighter version of the original color is
#AAFA5F, and Hex
#449400 is the 20% darker color. If the color is saturated by 10%, you get
#77CF24. If the color is desaturated by 10%, the color
#77BF34 is obtained.