The hex color #42fd64 is a light color. The web-safe version is Hex
#33FF66. A complementary color is
#BD029B. The grayscale version is
#8C8C8C. A 20% lighter version of the original color is
#75FF97, and Hex
#0FCA31 is the 20% darker color. If the color is saturated by 10%, you get
#3BFF60. If the color is desaturated by 10%, the color
#49F268 is obtained.