The hex color #00043e is a dark color. The web-safe version is Hex
#000033. A complementary color is
#FFFBC1. The grayscale version is
#161616. A 20% lighter version of the original color is
#333771, and Hex
#00000B is the 20% darker color. If the color is saturated by 10%, you get
#000242. If the color is desaturated by 10%, the color
#02063A is obtained.