The hex color #fd372b is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#02C8D4. The grayscale version is
#757575. A 20% lighter version of the original color is
#FF6A5E, and Hex
#CA0400 is the 20% darker color. If the color is saturated by 10%, you get
#FF3124. If the color is desaturated by 10%, the color
#EF3D32 is obtained.