HEX to OKLCH: #A50036

Result

Values are shown at full precision, so converting back gives exactly #a50036. 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: 0/255 = 0.00000 → 0.000000  (÷ 12.92)
   B: 54/255 = 0.21176 → 0.036889  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.157001
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.083693
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.056464

3. 3. cube root

   l′ = ∛0.157001 = 0.539470
   m′ = ∛0.083693 = 0.437418
   s′ = ∛0.056464 = 0.383641

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.45911
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.17763
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.04613

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.18352
   H = atan2(b, a) = 14.559°
   L = 0.45911

6. 6. OKLCH

   oklch(0.45911 0.18352 14.559)
   rounded: oklch(0.459 0.184 14.6)

All formats

HEX

#a50036

RGB

rgb(165 0 54)

RGB (legacy)

rgb(165, 0, 54)

HSL

hsl(340.36 100.00% 32.35%) → hsl(340 100% 32%)

HWB

hwb(340 0% 35%)

OKLCH

oklch(0.459 0.184 14.6) · oklch(45.9% 0.184 14.6)

OKLab

oklab(0.459 0.178 0.046)

Lab (D50)

lab(35.19 59.34 20.86)

LCH (D50)

lch(35.19 62.90 19.37)

Display P3

color(display-p3 0.5922 0.1149 0.2210)

Linear sRGB

color(srgb-linear 0.3763 0.0000 0.0369)

Gamut: sRGB and Display P3

#A50036 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.184 and Display P3 reaches 0.207; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #a50036;
  color: rgb(165 0 54);
  color: hsl(340 100% 32%);
  color: oklch(0.459 0.184 14.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.459 0.184 14.6);
}
/* arbitrary values */
class="text-[#a50036] bg-[oklch(0.459_0.184_14.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5922 0.1149 0.2210); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a50036 calc(l - 0.1) c h); }

Nearby colors

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

• v3 rose-800#9F1239
• pink-800#A3004C
• v3 pink-800#9D174D
• red-800#9F0712
• v3 red-800#991B1B
• brown#A52A2A
• firebrick#B22222
• rose-900#8B0836

Lighter and darker, same hue and chroma

• #BA2546 · oklch(0.519 0.184 14.6) · ΔL +0.06
• #900026 · oklch(0.399 0.184 14.6) · ΔL −0.06

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