The hex color #f55a2a is a light color. The web-safe version is Hex
#FF6633. A complementary color is
#0AA5D5. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#FF8D5D, and Hex
#C22700 is the 20% darker color. If the color is saturated by 10%, you get
#FF5622. If the color is desaturated by 10%, the color
#E95E32 is obtained.