The hex color #428d6c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#BD7293. The grayscale version is
#696969. A 20% lighter version of the original color is
#75C09F, and Hex
#0F5A39 is the 20% darker color. If the color is saturated by 10%, you get
#3E916C. If the color is desaturated by 10%, the color
#46896C is obtained.