HEX to OKLCH: #B45309

Result

Values are shown at full precision, so converting back gives exactly #b45309. 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: 180/255 = 0.70588 → 0.456411  (((x + 0.055) / 1.055)^2.4)
   G: 83/255 = 0.32549 → 0.086500  (((x + 0.055) / 1.055)^2.4)
   B: 9/255 = 0.03529 → 0.002732  (÷ 12.92)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.234676
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.155889
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.066392

3. 3. cube root

   l′ = ∛0.234676 = 0.616817
   m′ = ∛0.155889 = 0.538194
   s′ = ∛0.066392 = 0.404922

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.55528
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.09546
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.10981

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.14551
   H = atan2(b, a) = 48.998°
   L = 0.55528

6. 6. OKLCH

   oklch(0.55528 0.14551 48.998)
   rounded: oklch(0.555 0.146 49.0)

All formats

HEX

#b45309

RGB

rgb(180 83 9)

RGB (legacy)

rgb(180, 83, 9)

HSL

hsl(25.96 90.48% 37.06%) → hsl(26 90% 37%)

HWB

hwb(26 4% 29%)

OKLCH

oklch(0.555 0.146 49.0) · oklch(55.5% 0.146 49.0)

OKLab

oklab(0.555 0.095 0.110)

Lab (D50)

lab(47.46 37.77 54.90)

LCH (D50)

lch(47.46 66.64 55.47)

Display P3

color(display-p3 0.6582 0.3471 0.1360)

Linear sRGB

color(srgb-linear 0.4564 0.0865 0.0027)

Gamut: sRGB and Display P3

#B45309 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.149 and Display P3 reaches 0.169; this color uses 98% of the sRGB chroma available.

CSS snippets

.element {
  color: #b45309;
  color: rgb(180 83 9);
  color: hsl(26 90% 37%);
  color: oklch(0.555 0.146 49.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.555 0.146 49.0);
}
/* arbitrary values */
class="text-[#b45309] bg-[oklch(0.555_0.146_49.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6582 0.3471 0.1360); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #b45309 calc(l - 0.1) c h); }

Nearby colors

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

• amber-700#BB4D00
• yellow-700#A65F00
• v3 orange-700#C2410C
• sienna#A0522D
• v3 yellow-700#A16207
• orange-700#CA3500
• chocolate#D2691E
• amber-800#973C00

Lighter and darker, same hue and chroma

• #C86526 · oklch(0.615 0.146 49.0) · ΔL +0.06
• #A04100 · oklch(0.495 0.146 49.0) · ΔL −0.06

Open in the studio