The hex color #c23a2f is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#3DC5D0. The grayscale version is
#646464. A 20% lighter version of the original color is
#F56D62, and Hex
#8F0700 is the 20% darker color. If the color is saturated by 10%, you get
#CB362A. If the color is desaturated by 10%, the color
#B93E34 is obtained.