The hex color #40d8ed is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#BF2712. The grayscale version is
#ACACAC. A 20% lighter version of the original color is
#73FFFF, and Hex
#0DA5BA is the 20% darker color. If the color is saturated by 10%, you get
#35DCF3. If the color is desaturated by 10%, the color
#4BD4E7 is obtained.