HEX to HSL: #374151

Also known as: Tailwind v3 gray-700

#374151 → hsl(217 19% 27%)

Values are shown at full precision, so converting back gives exactly #374151. 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 = 0.2157
G = 0.2549
B = 0.3176
```

2. max, min, Δ

max = 0.3176
min = 0.2157
Δ = max − min = 0.1020

3. L
```
L = (max + min) / 2 = 0.2667 = 26.67%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.1912 = 19.12%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.2157 − 0.2549) / 0.1020 + 4) = 216.92°

6. HSL
```
hsl(216.92 19.12% 26.67%)
```

All formats

HEX: #374151
RGB: rgb(55 65 81)
RGB (legacy): rgb(55, 65, 81)
HSL: hsl(216.92 19.12% 26.67%) → hsl(217 19% 27%)
HWB: hwb(217 22% 68%)
OKLCH: oklch(0.373 0.031 259.7) · oklch(37.3% 0.031 259.7)
OKLab: oklab(0.373 -0.005 -0.030)
Lab (D50): lab(27.13 -0.95 -11.13)
LCH (D50): lch(27.13 11.17 265.11)
Display P3: color(display-p3 0.2232 0.2537 0.3122)
Linear sRGB: color(srgb-linear 0.0382 0.0529 0.0823)

Gamut: sRGB and Display P3

#374151 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.150 and Display P3 reaches 0.189; this color uses 20% of the sRGB chroma available.

CSS snippets

.element {
  color: #374151;
  color: rgb(55 65 81);
  color: hsl(217 19% 27%);
  color: oklch(0.373 0.031 259.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.373 0.031 259.7);
}
/* arbitrary values */
class="text-[#374151] bg-[oklch(0.373_0.031_259.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2232 0.2537 0.3122); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #374151 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

#475162 · oklch(0.433 0.031 259.7) · ΔL +0.06
#283141 · oklch(0.313 0.031 259.7) · 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?