The hex color #51934c is a dark color. The web-safe version is Hex
#669933. A complementary color is
#AE6CB3. The grayscale version is
#656565. A 20% lighter version of the original color is
#84C67F, and Hex
#1E6019 is the 20% darker color. If the color is saturated by 10%, you get
#4F9849. If the color is desaturated by 10%, the color
#538E4F is obtained.