The hex color #fd3a3f is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#02C5C0. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#FF6D72, and Hex
#CA070C is the 20% darker color. If the color is saturated by 10%, you get
#FF3339. If the color is desaturated by 10%, the color
#F04145 is obtained.