The hex color #77dd3c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#8822C3. The grayscale version is
#858585. A 20% lighter version of the original color is
#AAFF6F, and Hex
#44AA09 is the 20% darker color. If the color is saturated by 10%, you get
#76E635. If the color is desaturated by 10%, the color
#78D443 is obtained.