The hex color #78b51c is a light color. The web-safe version is Hex
#66CC33. A complementary color is
#874AE3. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#ABE84F, and Hex
#458200 is the 20% darker color. If the color is saturated by 10%, you get
#79BC14. If the color is desaturated by 10%, the color
#77AE24 is obtained.