The hex color #42cdcd is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#BD3232. The grayscale version is
#9F9F9F. A 20% lighter version of the original color is
#75FFFF, and Hex
#0F9A9A is the 20% darker color. If the color is saturated by 10%, you get
#39D2D2. If the color is desaturated by 10%, the color
#4BC8C8 is obtained.