HEX to HSL: #A6A09B

Also known as: Tailwind stone-400

#A6A09B → hsl(27 6% 63%)

Values are shown at full precision, so converting back gives exactly #a6a09b. 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 = 0.6510
G = 0.6275
B = 0.6078
```

2. max, min, Δ

max = 0.6510
min = 0.6078
Δ = max − min = 0.0431

3. L
```
L = (max + min) / 2 = 0.6294 = 62.94%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.0582 = 5.82%

5. H

max is R → H = 60° × (((G − B) / Δ) mod 6) = 60° × (((0.6275 − 0.6078) / 0.0431) mod 6) = 27.27°

6. HSL
```
hsl(27.27 5.82% 62.94%)
```

All formats

HEX: #a6a09b
RGB: rgb(166 160 155)
RGB (legacy): rgb(166, 160, 155)
HSL: hsl(27.27 5.82% 62.94%) → hsl(27 6% 63%)
HWB: hwb(27 61% 35%)
OKLCH: oklch(0.709 0.010 62.5) · oklch(70.9% 0.010 62.5)
OKLab: oklab(0.709 0.005 0.009)
Lab (D50): lab(66.27 1.57 3.43)
LCH (D50): lch(66.27 3.77 65.39)
Display P3: color(display-p3 0.6469 0.6283 0.6101)
Linear sRGB: color(srgb-linear 0.3813 0.3515 0.3278)

Gamut: sRGB and Display P3

#A6A09B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.162 and Display P3 reaches 0.186; this color uses 6% of the sRGB chroma available.

CSS snippets

.element {
  color: #a6a09b;
  color: rgb(166 160 155);
  color: hsl(27 6% 63%);
  color: oklch(0.709 0.010 62.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.709 0.010 62.5);
}
/* arbitrary values */
class="text-[#a6a09b] bg-[oklch(0.709_0.010_62.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6469 0.6283 0.6101); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a6a09b 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

#B9B3AE · oklch(0.769 0.010 62.5) · ΔL +0.06
#948E89 · oklch(0.649 0.010 62.5) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?