The hex color #ca1d3c is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#35E2C3. The grayscale version is
#616161. A 20% lighter version of the original color is
#FD506F, and Hex
#970009 is the 20% darker color. If the color is saturated by 10%, you get
#D51638. If the color is desaturated by 10%, the color
#C02440 is obtained.