The hex color #ca3a1e is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#35C5E1. The grayscale version is
#616161. A 20% lighter version of the original color is
#FD6D51, and Hex
#970700 is the 20% darker color. If the color is saturated by 10%, you get
#D53617. If the color is desaturated by 10%, the color
#BF3E25 is obtained.