The hex color #d5504b is a dark color. The web-safe version is Hex
#CC6633. A complementary color is
#2AAFB4. The grayscale version is
#7B7B7B. A 20% lighter version of the original color is
#FF837E, and Hex
#A21D18 is the 20% darker color. If the color is saturated by 10%, you get
#DE4C46. If the color is desaturated by 10%, the color
#CC5450 is obtained.