HEX to OKLCH: #90EE90

Also known as: CSS lightgreen

#90EE90 → oklch(0.868 0.156 144.1)

Values are shown at full precision, so converting back gives exactly #90ee90. 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: 144/255 = 0.56471 → 0.278894  (((x + 0.055) / 1.055)^2.4)
G: 238/255 = 0.93333 → 0.854993  (((x + 0.055) / 1.055)^2.4)
B: 144/255 = 0.56471 → 0.278894  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.587875
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.671044
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.441192

3. cube root

l′ = ∛0.587875 = 0.837712
m′ = ∛0.671044 = 0.875488
s′ = ∛0.441192 = 0.761277

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.86800
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.12618
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.09138

5. Oklab → OKLCH

C = √(a² + b²) = 0.15580
H = atan2(b, a) = 144.088°
L = 0.86800

6. OKLCH

oklch(0.86800 0.15580 144.088)
rounded: oklch(0.868 0.156 144.1)

All formats

HEX: #90ee90
RGB: rgb(144 238 144)
RGB (legacy): rgb(144, 238, 144)
HSL: hsl(120.00 73.44% 74.90%) → hsl(120 73% 75%)
HWB: hwb(120 56% 7%)
OKLCH: oklch(0.868 0.156 144.1) · oklch(86.8% 0.156 144.1)
OKLab: oklab(0.868 -0.126 0.091)
Lab (D50): lab(86.60 -43.02 36.39)
LCH (D50): lch(86.60 56.35 139.77)
Display P3: color(display-p3 0.6509 0.9241 0.6018)
Linear sRGB: color(srgb-linear 0.2789 0.8550 0.2789)

Gamut: sRGB and Display P3

#90EE90 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.281 and Display P3 reaches 0.315; this color uses 56% of the sRGB chroma available.

CSS snippets

.element {
  color: #90ee90;
  color: rgb(144 238 144);
  color: hsl(120 73% 75%);
  color: oklch(0.868 0.156 144.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.868 0.156 144.1);
}
/* arbitrary values */
class="text-[#90ee90] bg-[oklch(0.868_0.156_144.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6509 0.9241 0.6018); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #90ee90 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

#A4FFA3 · oklch(0.928 0.156 144.1) · ΔL +0.06
#7DDA7D · oklch(0.808 0.156 144.1) · ΔL −0.06

Open in the studio

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