The hex color #f00b39 is a dark color. The web-safe version is Hex
#FF0033. A complementary color is
#0FF4C6. The grayscale version is
#676767. A 20% lighter version of the original color is
#FF3E6C, and Hex
#BD0006 is the 20% darker color. If the color is saturated by 10%, you get
#FE0234. If the color is desaturated by 10%, the color
#E2143E is obtained.