The hex color #100a0b is a dark color. The web-safe version is Hex
#000000. A complementary color is
#EFF5F4. The grayscale version is
#0C0C0C. A 20% lighter version of the original color is
#433D3E, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#100A0B. If the color is desaturated by 10%, the color
#100A0B is obtained.