The hex color #d30a03 is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#2CF5FC. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#FF3D36, and Hex
#A00000 is the 20% darker color. If the color is saturated by 10%, you get
#E10400. If the color is desaturated by 10%, the color
#C5100A is obtained.