The hex color #d30d16 is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#2CF2E9. The grayscale version is
#525252. A 20% lighter version of the original color is
#FF4049, and Hex
#A00000 is the 20% darker color. If the color is saturated by 10%, you get
#E00610. If the color is desaturated by 10%, the color
#C6141C is obtained.