HEX to OKLCH: #2E8B57

Also known as: CSS seagreen

#2E8B57 → oklch(0.569 0.119 154.9)

Values are shown at full precision, so converting back gives exactly #2e8b57. 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: 46/255 = 0.18039 → 0.027321  (((x + 0.055) / 1.055)^2.4)
G: 139/255 = 0.54510 → 0.258183  (((x + 0.055) / 1.055)^2.4)
B: 87/255 = 0.34118 → 0.095307  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.154637
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.191770
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.135189

3. cube root

l′ = ∛0.154637 = 0.536749
m′ = ∛0.191770 = 0.576669
s′ = ∛0.135189 = 0.513232

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.56853
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.10755
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.05027

5. Oklab → OKLCH

C = √(a² + b²) = 0.11871
H = atan2(b, a) = 154.949°
L = 0.56853

6. OKLCH

oklch(0.56853 0.11871 154.949)
rounded: oklch(0.569 0.119 154.9)

All formats

HEX: #2e8b57
RGB: rgb(46 139 87)
RGB (legacy): rgb(46, 139, 87)
HSL: hsl(146.45 50.27% 36.27%) → hsl(146 50% 36%)
HWB: hwb(146 18% 45%)
OKLCH: oklch(0.569 0.119 154.9) · oklch(56.9% 0.119 154.9)
OKLab: oklab(0.569 -0.108 0.050)
Lab (D50): lab(51.49 -37.86 19.58)
LCH (D50): lch(51.49 42.63 152.66)
Display P3: color(display-p3 0.2898 0.5376 0.3590)
Linear sRGB: color(srgb-linear 0.0273 0.2582 0.0953)

Gamut: sRGB and Display P3

#2E8B57 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.141 and Display P3 reaches 0.195; this color uses 84% of the sRGB chroma available.

CSS snippets

.element {
  color: #2e8b57;
  color: rgb(46 139 87);
  color: hsl(146 50% 36%);
  color: oklch(0.569 0.119 154.9);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.569 0.119 154.9);
}
/* arbitrary values */
class="text-[#2e8b57] bg-[oklch(0.569_0.119_154.9)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2898 0.5376 0.3590); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #2e8b57 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

#439E68 · oklch(0.629 0.119 154.9) · ΔL +0.06
#147946 · oklch(0.509 0.119 154.9) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?