The hex color #00c3d9 is a light color. The web-safe version is Hex
#00CCCC. A complementary color is
#FF3C26. The grayscale version is
#898989. A 20% lighter version of the original color is
#33F6FF, and Hex
#0090A6 is the 20% darker color. If the color is saturated by 10%, you get
#00C9E1. If the color is desaturated by 10%, the color
#0EBDD1 is obtained.