The hex color #40b84f is a light color. The web-safe version is Hex
#33CC66. A complementary color is
#BF47B0. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#73EB82, and Hex
#0D851C is the 20% darker color. If the color is saturated by 10%, you get
#3CC04C. If the color is desaturated by 10%, the color
#45B152 is obtained.