The hex color #3d568c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C2A973. The grayscale version is
#606060. A 20% lighter version of the original color is
#7089BF, and Hex
#0A2359 is the 20% darker color. If the color is saturated by 10%, you get
#3A5590. If the color is desaturated by 10%, the color
#405788 is obtained.