#F21F38 Hex Color
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#f21f38 is a loud, saturated red with a slight crimson lean. Its high saturation and mid lightness read as heat and urgency, which makes it a natural fit for sale badges, buttons, and calls to action. Best used as a small accent in a 10 percent role, since full backgrounds of it overwhelm. Black text on it hits about 5.0:1 contrast, enough for WCAG AA body copy, and it sharpens nicely against deep teal.
Questions about #f21f38
What is #f21f38 in RGB, HSL and CMYK?
In RGB, #f21f38 is rgb(242, 31, 56), in HSL hsl(353, 89%, 54%) and in CMYK 0%, 87%, 77%, 5%.
What colors pair well with #f21f38?
Is #f21f38 readable on white or black?
#f21f38 has a 4.17:1 contrast ratio on white and 5.02:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works only for large text (24px, or 18.5px bold) and on black it works for body text. Try other pairs in the contrast checker.