HEX to OKLCH: #3F6212

Also known as: Tailwind v3 lime-800

#3F6212 → oklch(0.453 0.113 130.9)

Values are shown at full precision, so converting back gives exactly #3f6212. 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: 63/255 = 0.24706 → 0.049707  (((x + 0.055) / 1.055)^2.4)
G: 98/255 = 0.38431 → 0.122139  (((x + 0.055) / 1.055)^2.4)
B: 18/255 = 0.07059 → 0.006049  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.086308
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.094322
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.042609

3. cube root

l′ = ∛0.086308 = 0.441927
m′ = ∛0.094322 = 0.455203
s′ = ∛0.042609 = 0.349274

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.45284
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.07399
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.08532

5. Oklab → OKLCH

C = √(a² + b²) = 0.11293
H = atan2(b, a) = 130.933°
L = 0.45284

6. OKLCH

oklch(0.45284 0.11293 130.933)
rounded: oklch(0.453 0.113 130.9)

All formats

HEX: #3f6212
RGB: rgb(63 98 18)
RGB (legacy): rgb(63, 98, 18)
HSL: hsl(86.25 68.97% 22.75%) → hsl(86 69% 23%)
HWB: hwb(86 7% 62%)
OKLCH: oklch(0.453 0.113 130.9) · oklch(45.3% 0.113 130.9)
OKLab: oklab(0.453 -0.074 0.085)
Lab (D50): lab(37.66 -23.13 37.83)
LCH (D50): lch(37.66 44.34 121.44)
Display P3: color(display-p3 0.2775 0.3807 0.1294)
Linear sRGB: color(srgb-linear 0.0497 0.1221 0.0060)

Gamut: sRGB and Display P3

#3F6212 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.124 and Display P3 reaches 0.145; this color uses 91% of the sRGB chroma available.

CSS snippets

.element {
  color: #3f6212;
  color: rgb(63 98 18);
  color: hsl(86 69% 23%);
  color: oklch(0.453 0.113 130.9);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.453 0.113 130.9);
}
/* arbitrary values */
class="text-[#3f6212] bg-[oklch(0.453_0.113_130.9)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2775 0.3807 0.1294); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #3f6212 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

#4F7427 · oklch(0.513 0.113 130.9) · ΔL +0.06
#2F5100 · oklch(0.393 0.113 130.9) · ΔL −0.06

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