The hex color #4ECDF3 is a light color. The web-safe version is Hex
#66CCFF. A complementary color is
#B1320C. The grayscale version is
#AFAFAF. A 20% lighter version of the original color is
#81FFFF, and Hex
#1B9AC0 is the 20% darker color. If the color is saturated by 10%, you get
#44D0FA. If the color is desaturated by 10%, the color
#58CAEC is obtained.