The hex color #2b397d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D4C682. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#5E6CB0, and Hex
#00064A is the 20% darker color. If the color is saturated by 10%, you get
#283782. If the color is desaturated by 10%, the color
#2E3B78 is obtained.