HEX to HSL: #A1A1AA

Also known as: Tailwind v3 zinc-400

#A1A1AA → hsl(240 5% 65%)

Values are shown at full precision, so converting back gives exactly #a1a1aa. 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 = 0.6314
G = 0.6314
B = 0.6667
```

2. max, min, Δ

max = 0.6667
min = 0.6314
Δ = max − min = 0.0353

3. L
```
L = (max + min) / 2 = 0.6490 = 64.90%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.0503 = 5.03%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.6314 − 0.6314) / 0.0353 + 4) = 240.00°

6. HSL
```
hsl(240.00 5.03% 64.90%)
```

All formats

HEX: #a1a1aa
RGB: rgb(161 161 170)
RGB (legacy): rgb(161, 161, 170)
HSL: hsl(240.00 5.03% 64.90%) → hsl(240 5% 65%)
HWB: hwb(240 63% 33%)
OKLCH: oklch(0.712 0.013 286.1) · oklch(71.2% 0.013 286.1)
OKLab: oklab(0.712 0.004 -0.012)
Lab (D50): lab(66.46 1.31 -4.68)
LCH (D50): lch(66.46 4.86 285.68)
Display P3: color(display-p3 0.6314 0.6314 0.6636)
Linear sRGB: color(srgb-linear 0.3564 0.3564 0.4020)

Gamut: sRGB and Display P3

#A1A1AA is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.158 and Display P3 reaches 0.172; this color uses 8% of the sRGB chroma available.

CSS snippets

.element {
  color: #a1a1aa;
  color: rgb(161 161 170);
  color: hsl(240 5% 65%);
  color: oklch(0.712 0.013 286.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.712 0.013 286.1);
}
/* arbitrary values */
class="text-[#a1a1aa] bg-[oklch(0.712_0.013_286.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6314 0.6314 0.6636); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a1a1aa 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

#B4B4BD · oklch(0.772 0.013 286.1) · ΔL +0.06
#8F8F97 · oklch(0.652 0.013 286.1) · 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?