HEX to HSL: #3F3F46

Also known as: Tailwind zinc-700, Tailwind v3 zinc-700

#3F3F46 → hsl(240 5% 26%)

Values are shown at full precision, so converting back gives exactly #3f3f46. 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 = 0.2471
G = 0.2471
B = 0.2745
```

2. max, min, Δ

max = 0.2745
min = 0.2471
Δ = max − min = 0.0275

3. L
```
L = (max + min) / 2 = 0.2608 = 26.08%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.0526 = 5.26%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.2471 − 0.2471) / 0.0275 + 4) = 240.00°

6. HSL
```
hsl(240.00 5.26% 26.08%)
```

All formats

HEX: #3f3f46
RGB: rgb(63 63 70)
RGB (legacy): rgb(63, 63, 70)
HSL: hsl(240.00 5.26% 26.08%) → hsl(240 5% 26%)
HWB: hwb(240 25% 73%)
OKLCH: oklch(0.370 0.012 285.8) · oklch(37.0% 0.012 285.8)
OKLab: oklab(0.370 0.003 -0.011)
Lab (D50): lab(26.85 1.23 -4.28)
LCH (D50): lch(26.85 4.46 286.00)
Display P3: color(display-p3 0.2471 0.2471 0.2722)
Linear sRGB: color(srgb-linear 0.0497 0.0497 0.0612)

Gamut: sRGB and Display P3

#3F3F46 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.215 and Display P3 reaches 0.220; this color uses 6% of the sRGB chroma available.

CSS snippets

.element {
  color: #3f3f46;
  color: rgb(63 63 70);
  color: hsl(240 5% 26%);
  color: oklch(0.370 0.012 285.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.370 0.012 285.8);
}
/* arbitrary values */
class="text-[#3f3f46] bg-[oklch(0.370_0.012_285.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2471 0.2471 0.2722); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #3f3f46 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

#4F4F56 · oklch(0.430 0.012 285.8) · ΔL +0.06
#303036 · oklch(0.310 0.012 285.8) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?