The hex color #3d228e is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C2DD71. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#7055C1, and Hex
#0A005B is the 20% darker color. If the color is saturated by 10%, you get
#3B1E94. If the color is desaturated by 10%, the color
#3F2788 is obtained.