HEX to OKLCH: #808000

Also known as: CSS olive

#808000 → oklch(0.581 0.127 109.8)

Values are shown at full precision, so converting back gives exactly #808000. 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: 128/255 = 0.50196 → 0.215861  (((x + 0.055) / 1.055)^2.4)
G: 128/255 = 0.50196 → 0.215861  (((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 = 0.204755
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.192678
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.079873

3. cube root

l′ = ∛0.204755 = 0.589402
m′ = ∛0.192678 = 0.577578
s′ = ∛0.079873 = 0.430659

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.58066
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.04281
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.11912

5. Oklab → OKLCH

C = √(a² + b²) = 0.12658
H = atan2(b, a) = 109.769°
L = 0.58066

6. OKLCH

oklch(0.58066 0.12658 109.769)
rounded: oklch(0.581 0.127 109.8)

All formats

HEX: #808000
RGB: rgb(128 128 0)
RGB (legacy): rgb(128, 128, 0)
HSL: hsl(60.00 100.00% 25.10%) → hsl(60 100% 25%)
HWB: hwb(60 0% 50%)
OKLCH: oklch(0.581 0.127 109.8) · oklch(58.1% 0.127 109.8)
OKLab: oklab(0.581 -0.043 0.119)
Lab (D50): lab(52.15 -9.45 56.02)
LCH (D50): lch(52.15 56.82 99.57)
Display P3: color(display-p3 0.5020 0.5020 0.1487)
Linear sRGB: color(srgb-linear 0.2159 0.2159 0.0000)

Gamut: sRGB and Display P3

#808000 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 0.147; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #808000;
  color: rgb(128 128 0);
  color: hsl(60 100% 25%);
  color: oklch(0.581 0.127 109.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.581 0.127 109.8);
}
/* arbitrary values */
class="text-[#808000] bg-[oklch(0.581_0.127_109.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5020 0.5020 0.1487); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #808000 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

#929225 · oklch(0.641 0.127 109.8) · ΔL +0.06
#6F6E00 · oklch(0.521 0.127 109.8) · ΔL −0.06

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