The hex color #7dd51c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#822AE3. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#B0FF4F, and Hex
#4AA200 is the 20% darker color. If the color is saturated by 10%, you get
#7DDE13. If the color is desaturated by 10%, the color
#7DCC25 is obtained.