The hex color #c23c3d is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#3DC3C2. The grayscale version is
#696969. A 20% lighter version of the original color is
#F56F70, and Hex
#8F090A is the 20% darker color. If the color is saturated by 10%, you get
#CB3839. If the color is desaturated by 10%, the color
#B94141 is obtained.