HEX to OKLCH: #1D1816

Result

Values are shown at full precision, so converting back gives exactly #1d1816. 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: 29/255 = 0.11373 → 0.012286  (((x + 0.055) / 1.055)^2.4)
   G: 24/255 = 0.09412 → 0.009134  (((x + 0.055) / 1.055)^2.4)
   B: 22/255 = 0.08627 → 0.008023  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.010376
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.009683
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.008713

3. 3. cube root

   l′ = ∛0.010376 = 0.218113
   m′ = ∛0.009683 = 0.213141
   s′ = ∛0.008713 = 0.205770

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.21422
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.00651
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.00609

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.00892
   H = atan2(b, a) = 43.066°
   L = 0.21422

6. 6. OKLCH

   oklch(0.21422 0.00892 43.066)
   rounded: oklch(0.214 0.009 43.1)

All formats

HEX

#1d1816

RGB

rgb(29 24 22)

RGB (legacy)

rgb(29, 24, 22)

HSL

hsl(17.14 13.73% 10.00%) → hsl(17 14% 10%)

HWB

hwb(17 9% 89%)

OKLCH

oklch(0.214 0.009 43.1) · oklch(21.4% 0.009 43.1)

OKLab

oklab(0.214 0.007 0.006)

Lab (D50)

lab(8.80 2.24 2.36)

LCH (D50)

lch(8.80 3.25 46.46)

Display P3

color(display-p3 0.1105 0.0948 0.0874)

Linear sRGB

color(srgb-linear 0.0123 0.0091 0.0080)

Gamut: sRGB and Display P3

#1D1816 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.063 and Display P3 reaches 0.072; this color uses 14% of the sRGB chroma available.

CSS snippets

.element {
  color: #1d1816;
  color: rgb(29 24 22);
  color: hsl(17 14% 10%);
  color: oklch(0.214 0.009 43.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.214 0.009 43.1);
}
/* arbitrary values */
class="text-[#1d1816] bg-[oklch(0.214_0.009_43.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1105 0.0948 0.0874); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #1d1816 calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• stone-900#1C1917
• neutral-900#171717
• zinc-900#18181B
• mist-900#161B1D
• olive-900#1D1D16
• mauve-900#1D161E
• v3 gray-900#111827
• gray-900#101828

Lighter and darker, same hue and chroma

• #2B2624 · oklch(0.274 0.009 43.1) · ΔL +0.06
• #0F0B09 · oklch(0.154 0.009 43.1) · ΔL −0.06

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