The hex color #f23d2d is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#0DC2D2. The grayscale version is
#747474. A 20% lighter version of the original color is
#FF7060, and Hex
#BF0A00 is the 20% darker color. If the color is saturated by 10%, you get
#FF3826. If the color is desaturated by 10%, the color
#E54334 is obtained.