The hex color #4ed9db is a light color. The web-safe version is Hex
#66CCCC. A complementary color is
#B12624. The grayscale version is
#ABABAB. A 20% lighter version of the original color is
#81FFFF, and Hex
#1BA6A8 is the 20% darker color. If the color is saturated by 10%, you get
#45DEE0. If the color is desaturated by 10%, the color
#57D4D6 is obtained.