The hex color #4fcbdc is a light color. The web-safe version is Hex
#66CCCC. A complementary color is
#B03423. The grayscale version is
#A7A7A7. A 20% lighter version of the original color is
#82FEFF, and Hex
#1C98A9 is the 20% darker color. If the color is saturated by 10%, you get
#46CFE1. If the color is desaturated by 10%, the color
#58C7D7 is obtained.