The hex color #c12e3d is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#3ED1C2. The grayscale version is
#646464. A 20% lighter version of the original color is
#F46170, and Hex
#8E000A is the 20% darker color. If the color is saturated by 10%, you get
#CA2939. If the color is desaturated by 10%, the color
#B83341 is obtained.