The hex color #3ef45d is a light color. The web-safe version is Hex
#33FF66. A complementary color is
#C10BA2. The grayscale version is
#858585. A 20% lighter version of the original color is
#71FF90, and Hex
#0BC12A is the 20% darker color. If the color is saturated by 10%, you get
#37FF59. If the color is desaturated by 10%, the color
#45E961 is obtained.