HEX to HSL: #556B2F

Also known as: CSS darkolivegreen

#556B2F → hsl(82 39% 30%)

Values are shown at full precision, so converting back gives exactly #556b2f. 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 = 0.3333
G = 0.4196
B = 0.1843
```

2. max, min, Δ

max = 0.4196
min = 0.1843
Δ = max − min = 0.2353

3. L
```
L = (max + min) / 2 = 0.3020 = 30.20%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.3896 = 38.96%

5. H

max is G → H = 60° × ((B − R) / Δ + 2) = 60° × ((0.1843 − 0.3333) / 0.2353 + 2) = 82.00°

6. HSL
```
hsl(82.00 38.96% 30.20%)
```

All formats

HEX: #556b2f
RGB: rgb(85 107 47)
RGB (legacy): rgb(85, 107, 47)
HSL: hsl(82.00 38.96% 30.20%) → hsl(82 39% 30%)
HWB: hwb(82 18% 58%)
OKLCH: oklch(0.496 0.090 126.2) · oklch(49.6% 0.090 126.2)
OKLab: oklab(0.496 -0.053 0.072)
Lab (D50): lab(42.36 -16.40 30.32)
LCH (D50): lch(42.36 34.47 118.41)
Display P3: color(display-p3 0.3506 0.4171 0.2153)
Linear sRGB: color(srgb-linear 0.0908 0.1470 0.0284)

Gamut: sRGB and Display P3

#556B2F is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.126 and Display P3 reaches 0.148; this color uses 71% of the sRGB chroma available.

CSS snippets

.element {
  color: #556b2f;
  color: rgb(85 107 47);
  color: hsl(82 39% 30%);
  color: oklch(0.496 0.090 126.2);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.496 0.090 126.2);
}
/* arbitrary values */
class="text-[#556b2f] bg-[oklch(0.496_0.090_126.2)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3506 0.4171 0.2153); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #556b2f 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

#667D40 · oklch(0.556 0.090 126.2) · ΔL +0.06
#455A1D · oklch(0.436 0.090 126.2) · 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?