The hex color #37437c is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C8BC83. The grayscale version is
#525252. A 20% lighter version of the original color is
#6A76AF, and Hex
#041049 is the 20% darker color. If the color is saturated by 10%, you get
#344280. If the color is desaturated by 10%, the color
#3A4578 is obtained.