The hex color #d42f3b is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#2BD0C4. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#FF626E, and Hex
#A10008 is the 20% darker color. If the color is saturated by 10%, you get
#DF2936. If the color is desaturated by 10%, the color
#C93540 is obtained.