The hex color #42fad5 is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#BD052A. The grayscale version is
#B0B0B0. A 20% lighter version of the original color is
#75FFFF, and Hex
#0FC7A2 is the 20% darker color. If the color is saturated by 10%, you get
#37FFD9. If the color is desaturated by 10%, the color
#4DF3D1 is obtained.