The hex color #0d121c is a dark color. The web-safe version is Hex
#000033. A complementary color is
#F2EDE3. The grayscale version is
#141414. A 20% lighter version of the original color is
#40454F, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#0C121D. If the color is desaturated by 10%, the color
#0E121B is obtained.