The hex color #d30e3f is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#2CF1C0. The grayscale version is
#606060. A 20% lighter version of the original color is
#FF4172, and Hex
#A0000C is the 20% darker color. If the color is saturated by 10%, you get
#DF063C. If the color is desaturated by 10%, the color
#C81642 is obtained.