The hex color #42f77b is a light color. The web-safe version is Hex
#33FF66. A complementary color is
#BD0884. The grayscale version is
#919191. A 20% lighter version of the original color is
#75FFAE, and Hex
#0FC448 is the 20% darker color. If the color is saturated by 10%, you get
#3AFF79. If the color is desaturated by 10%, the color
#4AED7D is obtained.