The hex color #e54c3c is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#1AB3C3. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#FF7F6F, and Hex
#B21909 is the 20% darker color. If the color is saturated by 10%, you get
#F04736. If the color is desaturated by 10%, the color
#DA5142 is obtained.