The hex color #2d397a is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D2C685. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#606CAD, and Hex
#000647 is the 20% darker color. If the color is saturated by 10%, you get
#2A377F. If the color is desaturated by 10%, the color
#303B75 is obtained.