HEX to HSL: #708090

Also known as: CSS slategray, CSS slategrey

#708090 → hsl(210 13% 50%)

Values are shown at full precision, so converting back gives exactly #708090. 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 = 0.4392
G = 0.5020
B = 0.5647
```

2. max, min, Δ

max = 0.5647
min = 0.4392
Δ = max − min = 0.1255

3. L
```
L = (max + min) / 2 = 0.5020 = 50.20%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.1260 = 12.60%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.4392 − 0.5020) / 0.1255 + 4) = 210.00°

6. HSL
```
hsl(210.00 12.60% 50.20%)
```

All formats

HEX: #708090
RGB: rgb(112 128 144)
RGB (legacy): rgb(112, 128, 144)
HSL: hsl(210.00 12.60% 50.20%) → hsl(210 13% 50%)
HWB: hwb(210 44% 44%)
OKLCH: oklch(0.593 0.031 248.3) · oklch(59.3% 0.031 248.3)
OKLab: oklab(0.593 -0.011 -0.029)
Lab (D50): lab(52.70 -3.28 -10.74)
LCH (D50): lch(52.70 11.23 253.00)
Display P3: color(display-p3 0.4512 0.5000 0.5586)
Linear sRGB: color(srgb-linear 0.1620 0.2159 0.2789)

Gamut: sRGB and Display P3

#708090 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.161 and Display P3 reaches 0.208; this color uses 19% of the sRGB chroma available.

CSS snippets

.element {
  color: #708090;
  color: rgb(112 128 144);
  color: hsl(210 13% 50%);
  color: oklch(0.593 0.031 248.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.593 0.031 248.3);
}
/* arbitrary values */
class="text-[#708090] bg-[oklch(0.593_0.031_248.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4512 0.5000 0.5586); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #708090 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

#8292A2 · oklch(0.653 0.031 248.3) · ΔL +0.06
#5F6E7E · oklch(0.532 0.031 248.3) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?