HEX to HSL: #09090B

Also known as: Tailwind zinc-950, Tailwind v3 zinc-950

#09090B → hsl(240 10% 4%)

Values are shown at full precision, so converting back gives exactly #09090b. 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 = 0.0353
G = 0.0353
B = 0.0431
```

2. max, min, Δ

max = 0.0431
min = 0.0353
Δ = max − min = 0.0078

3. L
```
L = (max + min) / 2 = 0.0392 = 3.92%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.1000 = 10.00%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.0353 − 0.0353) / 0.0078 + 4) = 240.00°

6. HSL
```
hsl(240.00 10.00% 3.92%)
```

All formats

HEX: #09090b
RGB: rgb(9 9 11)
RGB (legacy): rgb(9, 9, 11)
HSL: hsl(240.00 10.00% 3.92%) → hsl(240 10% 4%)
HWB: hwb(240 4% 96%)
OKLCH: oklch(0.141 0.004 285.8) · oklch(14.1% 0.004 285.8)
OKLab: oklab(0.141 0.001 -0.004)
Lab (D50): lab(2.50 0.21 -0.77)
LCH (D50): lch(2.50 0.80 285.25)
Display P3: color(display-p3 0.0353 0.0353 0.0425)
Linear sRGB: color(srgb-linear 0.0027 0.0027 0.0033)

Gamut: sRGB and Display P3

#09090B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.082 and Display P3 reaches 0.083; this color uses 5% of the sRGB chroma available.

CSS snippets

.element {
  color: #09090b;
  color: rgb(9 9 11);
  color: hsl(240 10% 4%);
  color: oklch(0.141 0.004 285.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.141 0.004 285.8);
}
/* arbitrary values */
class="text-[#09090b] bg-[oklch(0.141_0.004_285.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0353 0.0353 0.0425); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #09090b 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

#161618 · oklch(0.201 0.004 285.8) · ΔL +0.06
#020202 · oklch(0.081 0.004 285.8) · 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?