HEX to OKLCH: #FB7185

Also known as: Tailwind v3 rose-400

#FB7185 → oklch(0.719 0.169 13.4)

Values are shown at full precision, so converting back gives exactly #fb7185. 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: 251/255 = 0.98431 → 0.964686  (((x + 0.055) / 1.055)^2.4)
G: 113/255 = 0.44314 → 0.165132  (((x + 0.055) / 1.055)^2.4)
B: 133/255 = 0.52157 → 0.234551  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.498297
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.342016
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.279467

3. cube root

l′ = ∛0.498297 = 0.792798
m′ = ∛0.342016 = 0.699330
s′ = ∛0.279467 = 0.653798

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.71919
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.16436
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.03924

5. Oklab → OKLCH

C = √(a² + b²) = 0.16898
H = atan2(b, a) = 13.428°
L = 0.71919

6. OKLCH

oklch(0.71919 0.16898 13.428)
rounded: oklch(0.719 0.169 13.4)

All formats

HEX: #fb7185
RGB: rgb(251 113 133)
RGB (legacy): rgb(251, 113, 133)
HSL: hsl(351.30 94.52% 71.37%) → hsl(351 95% 71%)
HWB: hwb(351 44% 2%)
OKLCH: oklch(0.719 0.169 13.4) · oklch(71.9% 0.169 13.4)
OKLab: oklab(0.719 0.164 0.039)
Lab (D50): lab(65.53 54.97 16.51)
LCH (D50): lch(65.53 57.40 16.72)
Display P3: color(display-p3 0.9176 0.4751 0.5291)
Linear sRGB: color(srgb-linear 0.9647 0.1651 0.2346)

Gamut: sRGB and Display P3

#FB7185 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.178 and Display P3 reaches 0.229; this color uses 95% of the sRGB chroma available.

CSS snippets

.element {
  color: #fb7185;
  color: rgb(251 113 133);
  color: hsl(351 95% 71%);
  color: oklch(0.719 0.169 13.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.719 0.169 13.4);
}
/* arbitrary values */
class="text-[#fb7185] bg-[oklch(0.719_0.169_13.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9176 0.4751 0.5291); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #fb7185 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

#FF8497 · oklch(0.779 0.169 13.4) · ΔL +0.06
#E65E73 · oklch(0.659 0.169 13.4) · ΔL −0.06

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