The hex color #421c1c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#BDE3E3. The grayscale version is
#292929. A 20% lighter version of the original color is
#754F4F, and Hex
#0F0000 is the 20% darker color. If the color is saturated by 10%, you get
#451B1B. If the color is desaturated by 10%, the color
#3F1D1D is obtained.