The hex color #40e69b is a light color. The web-safe version is Hex
#33FF99. A complementary color is
#BF1964. The grayscale version is
#969696. A 20% lighter version of the original color is
#73FFCE, and Hex
#0DB368 is the 20% darker color. If the color is saturated by 10%, you get
#37EE9C. If the color is desaturated by 10%, the color
#49DE9A is obtained.