The hex color #4fc3db is a light color. The web-safe version is Hex
#66CCCC. A complementary color is
#B03C24. The grayscale version is
#A4A4A4. A 20% lighter version of the original color is
#82F6FF, and Hex
#1C90A8 is the 20% darker color. If the color is saturated by 10%, you get
#46C6E0. If the color is desaturated by 10%, the color
#58C0D6 is obtained.