The hex color #15c99f is a light color. The web-safe version is Hex
#00CC99. A complementary color is
#EA3660. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#48FCD2, and Hex
#00966C is the 20% darker color. If the color is saturated by 10%, you get
#0AD0A2. If the color is desaturated by 10%, the color
#20C29C is obtained.