The hex color #00030f is a dark color. The web-safe version is Hex
#000000. A complementary color is
#FFFCF0. The grayscale version is
#060606. A 20% lighter version of the original color is
#333642, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#000310. If the color is desaturated by 10%, the color
#01030E is obtained.