The hex color #3d528d is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C2AD72. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#7085C0, and Hex
#0A1F5A is the 20% darker color. If the color is saturated by 10%, you get
#3A5192. If the color is desaturated by 10%, the color
#405388 is obtained.