The hex color #4fb9fb is a light color. The web-safe version is Hex
#66CCFF. A complementary color is
#B04604. The grayscale version is
#ACACAC. A 20% lighter version of the original color is
#82ECFF, and Hex
#1C86C8 is the 20% darker color. If the color is saturated by 10%, you get
#46BAFF. If the color is desaturated by 10%, the color
#58B8F3 is obtained.