HEX to HSL: #B22222

Also known as: CSS firebrick

#B22222 → hsl(0 68% 42%)

Values are shown at full precision, so converting back gives exactly #b22222. The rounded form is what you normally paste into CSS.

Step-by-step math

Every number below is computed from the input, nothing is looked up.

1. RGB ÷ 255
```
R = 0.6980
G = 0.1333
B = 0.1333
```

2. max, min, Δ

max = 0.6980
min = 0.1333
Δ = max − min = 0.5647

3. L
```
L = (max + min) / 2 = 0.4157 = 41.57%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.6792 = 67.92%

5. H

max is R → H = 60° × (((G − B) / Δ) mod 6) = 60° × (((0.1333 − 0.1333) / 0.5647) mod 6) = 0.00°

6. HSL
```
hsl(0.00 67.92% 41.57%)
```

All formats

HEX: #b22222
RGB: rgb(178 34 34)
RGB (legacy): rgb(178, 34, 34)
HSL: hsl(0.00 67.92% 41.57%) → hsl(0 68% 42%)
HWB: hwb(0 13% 30%)
OKLCH: oklch(0.497 0.180 26.8) · oklch(49.7% 0.180 26.8)
OKLab: oklab(0.497 0.160 0.081)
Lab (D50): lab(39.83 56.59 39.19)
LCH (D50): lch(39.83 68.83 34.70)
Display P3: color(display-p3 0.6414 0.1906 0.1654)
Linear sRGB: color(srgb-linear 0.4452 0.0160 0.0160)

Gamut: sRGB and Display P3

#B22222 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.202 and Display P3 reaches 0.228; this color uses 89% of the sRGB chroma available.

CSS snippets

.element {
  color: #b22222;
  color: rgb(178 34 34);
  color: hsl(0 68% 42%);
  color: oklch(0.497 0.180 26.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.497 0.180 26.8);
}
/* arbitrary values */
class="text-[#b22222] bg-[oklch(0.497_0.180_26.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6414 0.1906 0.1654); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #b22222 calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

Lighter and darker, same hue and chroma

#C73934 · oklch(0.557 0.180 26.8) · ΔL +0.06
#9D000D · oklch(0.437 0.180 26.8) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

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Guides: What is OKLCH?