The hex color #13171c is a dark color. The web-safe version is Hex
#000033. A complementary color is
#ECE8E3. The grayscale version is
#171717. A 20% lighter version of the original color is
#464A4F, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#13171C. If the color is desaturated by 10%, the color
#13171C is obtained.