HEX to OKLCH: #E11D48

Also known as: Tailwind v3 rose-600

#E11D48 → oklch(0.586 0.222 17.6)

Values are shown at full precision, so converting back gives exactly #e11d48. 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: 225/255 = 0.88235 → 0.752942  (((x + 0.055) / 1.055)^2.4)
G: 29/255 = 0.11373 → 0.012286  (((x + 0.055) / 1.055)^2.4)
B: 72/255 = 0.28235 → 0.064803  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.320302
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.174874
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.110773

3. cube root

l′ = ∛0.320302 = 0.684206
m′ = ∛0.174874 = 0.559210
s′ = ∛0.110773 = 0.480261

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.58584
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.21167
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.06708

5. Oklab → OKLCH

C = √(a² + b²) = 0.22204
H = atan2(b, a) = 17.585°
L = 0.58584

6. OKLCH

oklch(0.58584 0.22204 17.585)
rounded: oklch(0.586 0.222 17.6)

All formats

HEX: #e11d48
RGB: rgb(225 29 72)
RGB (legacy): rgb(225, 29, 72)
HSL: hsl(346.84 77.17% 49.80%) → hsl(347 77% 50%)
HWB: hwb(347 11% 12%)
OKLCH: oklch(0.586 0.222 17.6) · oklch(58.6% 0.222 17.6)
OKLab: oklab(0.586 0.212 0.067)
Lab (D50): lab(49.53 71.59 30.46)
LCH (D50): lch(49.53 77.80 23.05)
Display P3: color(display-p3 0.8103 0.2117 0.2990)
Linear sRGB: color(srgb-linear 0.7529 0.0123 0.0648)

Gamut: sRGB and Display P3

#E11D48 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.235 and Display P3 reaches 0.265; this color uses 95% of the sRGB chroma available.

CSS snippets

.element {
  color: #e11d48;
  color: rgb(225 29 72);
  color: hsl(347 77% 50%);
  color: oklch(0.586 0.222 17.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.586 0.222 17.6);
}
/* arbitrary values */
class="text-[#e11d48] bg-[oklch(0.586_0.222_17.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.8103 0.2117 0.2990); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #e11d48 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

#F73A59 · oklch(0.646 0.222 17.6) · ΔL +0.06
#CB0037 · oklch(0.526 0.222 17.6) · ΔL −0.06

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