The hex color #d30a1e is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#2CF5E1. The grayscale version is
#545454. A 20% lighter version of the original color is
#FF3D51, and Hex
#A00000 is the 20% darker color. If the color is saturated by 10%, you get
#E00319. If the color is desaturated by 10%, the color
#C61123 is obtained.