#B21C05 Hex Color
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This saturated red carries intense warmth and a heavy, grounded presence. Because it is so deep and pigmented, #b21c05 functions best as a striking accent rather than a full background. It pairs exceptionally well with cool charcoal grays to create high-contrast, professional visuals. Since white text reads clearly against this shade, it is a strong choice for urgent buttons or bold call-to-action elements.
Questions about #b21c05
What is #b21c05 in RGB, HSL and CMYK?
In RGB, #b21c05 is rgb(178, 28, 5), in HSL hsl(8, 95%, 36%) and in CMYK 0%, 84%, 97%, 30%.
How does #b21c05 perform in digital UI design?
#b21c05 is an excellent choice for primary call-to-action buttons because the high saturation commands immediate attention. Pair it with crisp white text to ensure the contrast ratio meets accessibility standards while keeping the layout clean and readable.
What colors pair best with #b21c05 for a balanced palette?
This shade thrives when paired with cool, dark charcoal grays or deep navies to anchor its intense warmth. Using these neutral, cool-toned companions allows the vibrancy of #b21c05 to pop as an accent without overwhelming your design.
Is #b21c05 readable on white or black?
#b21c05 has a 6.85:1 contrast ratio on white and 3.06:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works for body text and on black it works only for large text (24px, or 18.5px bold). Try other pairs in the contrast checker.