The hex color #18b538 is a dark color. The web-safe version is Hex
#00CC33. A complementary color is
#E74AC7. The grayscale version is
#575757. A 20% lighter version of the original color is
#4BE86B, and Hex
#008205 is the 20% darker color. If the color is saturated by 10%, you get
#12BE35. If the color is desaturated by 10%, the color
#1EAC3B is obtained.