HEX to OKLCH: #C10007

Also known as: Tailwind red-700

#C10007 → oklch(0.509 0.209 28.5)

Values are shown at full precision, so converting back gives exactly #c10007. 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: 193/255 = 0.75686 → 0.533276  (((x + 0.055) / 1.055)^2.4)
G: 0/255 = 0.00000 → 0.000000  (÷ 12.92)
B: 7/255 = 0.02745 → 0.002125  (÷ 12.92)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.219937
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.113231
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.048428

3. cube root

l′ = ∛0.219937 = 0.603624
m′ = ∛0.113231 = 0.483788
s′ = ∛0.048428 = 0.364501

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.50949
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.18328
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.09957

5. Oklab → OKLCH

C = √(a² + b²) = 0.20858
H = atan2(b, a) = 28.513°
L = 0.50949

6. OKLCH

oklch(0.50949 0.20858 28.513)
rounded: oklch(0.509 0.209 28.5)

All formats

HEX: #c10007
RGB: rgb(193 0 7)
RGB (legacy): rgb(193, 0, 7)
HSL: hsl(357.82 100.00% 37.84%) → hsl(358 100% 38%)
HWB: hwb(358 0% 24%)
OKLCH: oklch(0.509 0.209 28.5) · oklch(50.9% 0.209 28.5)
OKLab: oklab(0.509 0.183 0.100)
Lab (D50): lab(41.02 65.57 54.05)
LCH (D50): lch(41.02 84.98 39.50)
Display P3: color(display-p3 0.6934 0.1415 0.1064)
Linear sRGB: color(srgb-linear 0.5333 0.0000 0.0021)

Gamut: sRGB and Display P3

#C10007 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.209 and Display P3 reaches 0.235; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #c10007;
  color: rgb(193 0 7);
  color: hsl(358 100% 38%);
  color: oklch(0.509 0.209 28.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.509 0.209 28.5);
}
/* arbitrary values */
class="text-[#c10007] bg-[oklch(0.509_0.209_28.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6934 0.1415 0.1064); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #c10007 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

#D72A22 · oklch(0.569 0.209 28.5) · ΔL +0.06
#AB0000 · oklch(0.449 0.209 28.5) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?