HEX to OKLCH: #A1A1AA

Result

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. 1. sRGB → linear

   R: 161/255 = 0.63137 → 0.356400  (((x + 0.055) / 1.055)^2.4)
   G: 161/255 = 0.63137 → 0.356400  (((x + 0.055) / 1.055)^2.4)
   B: 170/255 = 0.66667 → 0.401978  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.358745
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.361295
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.385113

3. 3. cube root

   l′ = ∛0.358745 = 0.710551
   m′ = ∛0.361295 = 0.712231
   s′ = ∛0.385113 = 0.727550

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.71181
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.00358
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.01243

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.01294
   H = atan2(b, a) = 286.066°
   L = 0.71181

6. 6. OKLCH

   oklch(0.71181 0.01294 286.066)
   rounded: oklch(0.712 0.013 286.1)

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).

• zinc-400#9F9FA9
• v3 gray-400#9CA3AF
• mauve-400#A89EA9
• gray-400#99A1AF
• neutral-400#A1A1A1
• v3 neutral-400#A3A3A3
• mist-400#9CA8AB
• v3 stone-400#A8A29E

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

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