HEX to OKLCH: #A65F00

Also known as: Tailwind yellow-700

#A65F00 → oklch(0.555 0.127 62.5)

Values are shown at full precision, so converting back gives exactly #a65f00. 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. sRGB → linear

R: 166/255 = 0.65098 → 0.381326  (((x + 0.055) / 1.055)^2.4)
G: 95/255 = 0.37255 → 0.114435  (((x + 0.055) / 1.055)^2.4)
B: 0/255 = 0.00000 → 0.000000  (÷ 12.92)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.218566
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.158700
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.065911

3. cube root

l′ = ∛0.218566 = 0.602367
m′ = ∛0.158700 = 0.541410
s′ = ∛0.065911 = 0.403942

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.55480
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.05863
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.11275

5. Oklab → OKLCH

C = √(a² + b²) = 0.12708
H = atan2(b, a) = 62.525°
L = 0.55480

6. OKLCH

oklch(0.55480 0.12708 62.525)
rounded: oklch(0.555 0.127 62.5)

All formats

HEX: #a65f00
RGB: rgb(166 95 0)
RGB (legacy): rgb(166, 95, 0)
HSL: hsl(34.34 100.00% 32.55%) → hsl(34 100% 33%)
HWB: hwb(34 0% 35%)
OKLCH: oklch(0.555 0.127 62.5) · oklch(55.5% 0.127 62.5)
OKLab: oklab(0.555 0.059 0.113)
Lab (D50): lab(47.86 25.71 55.91)
LCH (D50): lch(47.86 61.54 65.30)
Display P3: color(display-p3 0.6130 0.3860 0.1273)
Linear sRGB: color(srgb-linear 0.3813 0.1144 0.0000)

Gamut: sRGB and Display P3

#A65F00 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.127 and Display P3 reaches 0.145; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #a65f00;
  color: rgb(166 95 0);
  color: hsl(34 100% 33%);
  color: oklch(0.555 0.127 62.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.555 0.127 62.5);
}
/* arbitrary values */
class="text-[#a65f00] bg-[oklch(0.555_0.127_62.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6130 0.3860 0.1273); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a65f00 calc(l - 0.1) c h); }

Nearby colors

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

Lighter and darker, same hue and chroma

#BA7122 · oklch(0.615 0.127 62.5) · ΔL +0.06
#934D00 · oklch(0.495 0.127 62.5) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?