The hex color #4ef8fb is a light color. The web-safe version is Hex
#66FFFF. A complementary color is
#B10704. The grayscale version is
#C0C0C0. A 20% lighter version of the original color is
#81FFFF, and Hex
#1BC5C8 is the 20% darker color. If the color is saturated by 10%, you get
#43FEFF. If the color is desaturated by 10%, the color
#59F2F5 is obtained.