The hex color #d8391c is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#27C6E3. The grayscale version is
#646464. A 20% lighter version of the original color is
#FF6C4F, and Hex
#A50600 is the 20% darker color. If the color is saturated by 10%, you get
#E43515. If the color is desaturated by 10%, the color
#CC3D23 is obtained.