The hex color #00c3f5 is a light color. The web-safe version is Hex
#00CCFF. A complementary color is
#FF3C0A. The grayscale version is
#939393. A 20% lighter version of the original color is
#33F6FF, and Hex
#0090C2 is the 20% darker color. If the color is saturated by 10%, you get
#00C8FF. If the color is desaturated by 10%, the color
#0FBEEB is obtained.