The hex color #00003b is a dark color. The web-safe version is Hex
#000033. A complementary color is
#FFFFC4. The grayscale version is
#141414. A 20% lighter version of the original color is
#33336E, and Hex
#000008 is the 20% darker color. If the color is saturated by 10%, you get
#00003F. If the color is desaturated by 10%, the color
#020237 is obtained.