The hex color #42437c is a dark color. The web-safe version is Hex
#333366. A complementary color is
#BDBC83. The grayscale version is
#565656. A 20% lighter version of the original color is
#7576AF, and Hex
#0F1049 is the 20% darker color. If the color is saturated by 10%, you get
#404180. If the color is desaturated by 10%, the color
#444578 is obtained.