The hex color #40d34f is a light color. The web-safe version is Hex
#33CC66. A complementary color is
#BF2CB0. The grayscale version is
#767676. A 20% lighter version of the original color is
#73FF82, and Hex
#0DA01C is the 20% darker color. If the color is saturated by 10%, you get
#3BDC4B. If the color is desaturated by 10%, the color
#45CA53 is obtained.