HEX to OKLCH: #CA3500

Result

Values are shown at full precision, so converting back gives exactly #ca3500. 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: 202/255 = 0.79216 → 0.590619  (((x + 0.055) / 1.055)^2.4)
   G: 53/255 = 0.20784 → 0.035601  (((x + 0.055) / 1.055)^2.4)
   B: 0/255 = 0.00000 → 0.000000  (÷ 12.92)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.262560
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.149388
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.062183

3. 3. cube root

   l′ = ∛0.262560 = 0.640338
   m′ = ∛0.149388 = 0.530606
   s′ = ∛0.062183 = 0.396177

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.55425
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.15648
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.11155

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.19217
   H = atan2(b, a) = 35.485°
   L = 0.55425

6. 6. OKLCH

   oklch(0.55425 0.19217 35.485)
   rounded: oklch(0.554 0.192 35.5)

All formats

HEX

#ca3500

RGB

rgb(202 53 0)

RGB (legacy)

rgb(202, 53, 0)

HSL

hsl(15.74 100.00% 39.61%) → hsl(16 100% 40%)

HWB

hwb(16 0% 21%)

OKLCH

oklch(0.554 0.192 35.5) · oklch(55.4% 0.192 35.5)

OKLab

oklab(0.554 0.156 0.112)

Lab (D50)

lab(46.57 57.92 59.50)

LCH (D50)

lch(46.57 83.03 45.77)

Display P3

color(display-p3 0.7301 0.2577 0.1159)

Linear sRGB

color(srgb-linear 0.5906 0.0356 0.0000)

Gamut: sRGB and Display P3

#CA3500 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.192 and Display P3 reaches 0.216; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #ca3500;
  color: rgb(202 53 0);
  color: hsl(16 100% 40%);
  color: oklch(0.554 0.192 35.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.554 0.192 35.5);
}
/* arbitrary values */
class="text-[#ca3500] bg-[oklch(0.554_0.192_35.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.7301 0.2577 0.1159); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #ca3500 calc(l - 0.1) c h); }

Nearby colors

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

• v3 orange-700#C2410C
• v3 red-600#DC2626
• amber-700#BB4D00
• red-700#C10007
• v3 red-700#B91C1C
• red-600#E7000B
• v3 amber-700#B45309
• crimson#DC143C

Lighter and darker, same hue and chroma

• #DF4B22 · oklch(0.614 0.192 35.5) · ΔL +0.06
• #B51B00 · oklch(0.494 0.192 35.5) · ΔL −0.06

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