The hex color #1eef3e is a light color. The web-safe version is Hex
#33FF33. A complementary color is
#E110C1. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#51FF71, and Hex
#00BC0B is the 20% darker color. If the color is saturated by 10%, you get
#16FC39. If the color is desaturated by 10%, the color
#26E243 is obtained.