The hex color #00c3b5 is a light color. The web-safe version is Hex
#00CCCC. A complementary color is
#FF3C4A. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#33F6E8, and Hex
#009082 is the 20% darker color. If the color is saturated by 10%, you get
#00CABB. If the color is desaturated by 10%, the color
#0DBCAF is obtained.