The hex color #f61b3d is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#09E4C2. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#FF4E70, and Hex
#C3000A is the 20% darker color. If the color is saturated by 10%, you get
#FF1338. If the color is desaturated by 10%, the color
#E92342 is obtained.