The hex color #13a59f is a dark color. The web-safe version is Hex
#009999. A complementary color is
#EC5A60. The grayscale version is
#727272. A 20% lighter version of the original color is
#46D8D2, and Hex
#00726C is the 20% darker color. If the color is saturated by 10%, you get
#09AAA3. If the color is desaturated by 10%, the color
#1DA09B is obtained.