HEX to OKLCH: #7CFC00

Also known as: CSS lawngreen

#7CFC00 → oklch(0.882 0.263 136.2)

Values are shown at full precision, so converting back gives exactly #7cfc00. 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: 124/255 = 0.48627 → 0.201556  (((x + 0.055) / 1.055)^2.4)
G: 252/255 = 0.98824 → 0.973445  (((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 = 0.605176
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.705334
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.292036

3. cube root

l′ = ∛0.605176 = 0.845851
m′ = ∛0.705334 = 0.890154
s′ = ∛0.292036 = 0.663456

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.88175
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.18978
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.18218

5. Oklab → OKLCH

C = √(a² + b²) = 0.26307
H = atan2(b, a) = 136.171°
L = 0.88175

6. OKLCH

oklch(0.88175 0.26307 136.171)
rounded: oklch(0.882 0.263 136.2)

All formats

HEX: #7cfc00
RGB: rgb(124 252 0)
RGB (legacy): rgb(124, 252, 0)
HSL: hsl(90.48 100.00% 49.41%) → hsl(90 100% 49%)
HWB: hwb(90 0% 1%)
OKLCH: oklch(0.882 0.263 136.2) · oklch(88.2% 0.263 136.2)
OKLab: oklab(0.882 -0.190 0.182)
Lab (D50): lab(89.05 -61.33 83.04)
LCH (D50): lch(89.05 103.23 126.45)
Display P3: color(display-p3 0.6169 0.9767 0.3014)
Linear sRGB: color(srgb-linear 0.2016 0.9734 0.0000)

Gamut: sRGB and Display P3

#7CFC00 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.263 and Display P3 reaches 0.309; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #7cfc00;
  color: rgb(124 252 0);
  color: hsl(90 100% 49%);
  color: oklch(0.882 0.263 136.2);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.882 0.263 136.2);
}
/* arbitrary values */
class="text-[#7cfc00] bg-[oklch(0.882_0.263_136.2)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6169 0.9767 0.3014); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #7cfc00 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

#90FF38 · oklch(0.942 0.263 136.2) · ΔL +0.06
#67E700 · oklch(0.822 0.263 136.2) · ΔL −0.06

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