The hex color #2de51c is a light color. The web-safe version is Hex
#33CC33. A complementary color is
#D21AE3. The grayscale version is
#656565. A 20% lighter version of the original color is
#60FF4F, and Hex
#00B200 is the 20% darker color. If the color is saturated by 10%, you get
#27F215. If the color is desaturated by 10%, the color
#33D823 is obtained.