HEX to OKLCH: #A52A2A

Result

Values are shown at full precision, so converting back gives exactly #a52a2a. 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: 165/255 = 0.64706 → 0.376262  (((x + 0.055) / 1.055)^2.4)
   G: 42/255 = 0.16471 → 0.023153  (((x + 0.055) / 1.055)^2.4)
   B: 42/255 = 0.16471 → 0.023153  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.168712
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.097978
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.054334

3. 3. cube root

   l′ = ∛0.168712 = 0.552564
   m′ = ∛0.097978 = 0.461010
   s′ = ∛0.054334 = 0.378753

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.48061
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.14403
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.06889

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.15966
   H = atan2(b, a) = 25.562°
   L = 0.48061

6. 6. OKLCH

   oklch(0.48061 0.15966 25.562)
   rounded: oklch(0.481 0.160 25.6)

All formats

HEX

#a52a2a

RGB

rgb(165 42 42)

RGB (legacy)

rgb(165, 42, 42)

HSL

hsl(0.00 59.42% 40.59%) → hsl(0 59% 41%)

HWB

hwb(0 16% 35%)

OKLCH

oklch(0.481 0.160 25.6) · oklch(48.1% 0.160 25.6)

OKLab

oklab(0.481 0.144 0.069)

Lab (D50)

lab(38.15 50.38 31.83)

LCH (D50)

lch(38.15 59.60 32.29)

Display P3

color(display-p3 0.5957 0.2056 0.1870)

Linear sRGB

color(srgb-linear 0.3763 0.0232 0.0232)

Gamut: sRGB and Display P3

#A52A2A is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.195 and Display P3 reaches 0.220; this color uses 82% of the sRGB chroma available.

CSS snippets

.element {
  color: #a52a2a;
  color: rgb(165 42 42);
  color: hsl(0 59% 41%);
  color: oklch(0.481 0.160 25.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.481 0.160 25.6);
}
/* arbitrary values */
class="text-[#a52a2a] bg-[oklch(0.481_0.160_25.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5957 0.2056 0.1870); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a52a2a calc(l - 0.1) c h); }

Nearby colors

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

• firebrick#B22222
• orange-800#9F2D00
• v3 orange-800#9A3412
• v3 red-800#991B1B
• v3 red-700#B91C1C
• red-800#9F0712
• v3 rose-800#9F1239
• rose-800#A50036

Lighter and darker, same hue and chroma

• #BA3E3B · oklch(0.541 0.160 25.6) · ΔL +0.06
• #911119 · oklch(0.421 0.160 25.6) · ΔL −0.06

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