The hex color #00c3e9 is a light color. The web-safe version is Hex
#00CCFF. A complementary color is
#FF3C16. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#33F6FF, and Hex
#0090B6 is the 20% darker color. If the color is saturated by 10%, you get
#00C8F2. If the color is desaturated by 10%, the color
#0EBEE0 is obtained.