The hex color #51a075 is a light color. The web-safe version is Hex
#669966. A complementary color is
#AE5F8A. The grayscale version is
#777777. A 20% lighter version of the original color is
#84D3A8, and Hex
#1E6D42 is the 20% darker color. If the color is saturated by 10%, you get
#4DA475. If the color is desaturated by 10%, the color
#559C75 is obtained.