HEX to OKLCH: #3CB371

Also known as: CSS mediumseagreen

#3CB371 → oklch(0.684 0.144 155.0)

Values are shown at full precision, so converting back gives exactly #3cb371. 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: 60/255 = 0.23529 → 0.045186  (((x + 0.055) / 1.055)^2.4)
G: 179/255 = 0.70196 → 0.450786  (((x + 0.055) / 1.055)^2.4)
B: 113/255 = 0.44314 → 0.165132  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.268893
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.334159
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.235015

3. cube root

l′ = ∛0.268893 = 0.645446
m′ = ∛0.334159 = 0.693934
s′ = ∛0.235015 = 0.617113

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.68404
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.13052
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.06087

5. Oklab → OKLCH

C = √(a² + b²) = 0.14402
H = atan2(b, a) = 154.999°
L = 0.68404

6. OKLCH

oklch(0.68404 0.14402 154.999)
rounded: oklch(0.684 0.144 155.0)

All formats

HEX: #3cb371
RGB: rgb(60 179 113)
RGB (legacy): rgb(60, 179, 113)
HSL: hsl(146.72 49.79% 46.86%) → hsl(147 50% 47%)
HWB: hwb(147 24% 30%)
OKLCH: oklch(0.684 0.144 155.0) · oklch(68.4% 0.144 155.0)
OKLab: oklab(0.684 -0.131 0.061)
Lab (D50): lab(65.22 -45.97 23.71)
LCH (D50): lch(65.22 51.73 152.72)
Display P3: color(display-p3 0.3768 0.6925 0.4658)
Linear sRGB: color(srgb-linear 0.0452 0.4508 0.1651)

Gamut: sRGB and Display P3

#3CB371 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.169 and Display P3 reaches 0.234; this color uses 85% of the sRGB chroma available.

CSS snippets

.element {
  color: #3cb371;
  color: rgb(60 179 113);
  color: hsl(147 50% 47%);
  color: oklch(0.684 0.144 155.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.684 0.144 155.0);
}
/* arbitrary values */
class="text-[#3cb371] bg-[oklch(0.684_0.144_155.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3768 0.6925 0.4658); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #3cb371 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

#52C683 · oklch(0.744 0.144 155.0) · ΔL +0.06
#21A05F · oklch(0.624 0.144 155.0) · ΔL −0.06

Open in the studio

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