The hex color #12436c is a dark color. The web-safe version is Hex
#003366. A complementary color is
#EDBC93. The grayscale version is
#404040. A 20% lighter version of the original color is
#45769F, and Hex
#001039 is the 20% darker color. If the color is saturated by 10%, you get
#0D4370. If the color is desaturated by 10%, the color
#174368 is obtained.