The hex color #42a78d is a light color. The web-safe version is Hex
#339999. A complementary color is
#BD5872. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#75DAC0, and Hex
#0F745A is the 20% darker color. If the color is saturated by 10%, you get
#3CAB8F. If the color is desaturated by 10%, the color
#48A38B is obtained.