The hex color #4dbb51 is a light color. The web-safe version is Hex
#66CC66. A complementary color is
#B244AE. The grayscale version is
#737373. A 20% lighter version of the original color is
#80EE84, and Hex
#1A881E is the 20% darker color. If the color is saturated by 10%, you get
#49C24E. If the color is desaturated by 10%, the color
#51B454 is obtained.