The hex color #15c38d is a light color. The web-safe version is Hex
#00CC99. A complementary color is
#EA3C72. The grayscale version is
#777777. A 20% lighter version of the original color is
#48F6C0, and Hex
#00905A is the 20% darker color. If the color is saturated by 10%, you get
#0BCB8F. If the color is desaturated by 10%, the color
#1FBB8B is obtained.