The hex color #00c4f3 is a light color. The web-safe version is Hex
#00CCFF. A complementary color is
#FF3B0C. The grayscale version is
#929292. A 20% lighter version of the original color is
#33F7FF, and Hex
#0091C0 is the 20% darker color. If the color is saturated by 10%, you get
#00C9FD. If the color is desaturated by 10%, the color
#0FBFE9 is obtained.