The hex color #37e51c is a light color. The web-safe version is Hex
#33CC33. A complementary color is
#C81AE3. The grayscale version is
#686868. A 20% lighter version of the original color is
#6AFF4F, and Hex
#04B200 is the 20% darker color. If the color is saturated by 10%, you get
#32F214. If the color is desaturated by 10%, the color
#3CD924 is obtained.