The hex color #4ef5fb is a light color. The web-safe version is Hex
#66FFFF. A complementary color is
#B10A04. The grayscale version is
#BFBFBF. A 20% lighter version of the original color is
#81FFFF, and Hex
#1BC2C8 is the 20% darker color. If the color is saturated by 10%, you get
#43FAFF. If the color is desaturated by 10%, the color
#59F0F5 is obtained.