The hex color #42f6e3 is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#BD091C. The grayscale version is
#B4B4B4. A 20% lighter version of the original color is
#75FFFF, and Hex
#0FC3B0 is the 20% darker color. If the color is saturated by 10%, you get
#37FDE8. If the color is desaturated by 10%, the color
#4DEFDE is obtained.