HEX to OKLCH: #090B0C

Also known as: Tailwind mist-950

#090B0C → oklch(0.148 0.004 228.8)

Values are shown at full precision, so converting back gives exactly #090b0c. 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: 9/255 = 0.03529 → 0.002732  (÷ 12.92)
G: 11/255 = 0.04314 → 0.003347  (((x + 0.055) / 1.055)^2.4)
B: 12/255 = 0.04706 → 0.003677  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.003110
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.003252
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.003500

3. cube root

l′ = ∛0.003110 = 0.145968
m′ = ∛0.003252 = 0.148151
s′ = ∛0.003500 = 0.151831

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.14768
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.00266
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.00303

5. Oklab → OKLCH

C = √(a² + b²) = 0.00403
H = atan2(b, a) = 228.760°
L = 0.14768

6. OKLCH

oklch(0.14768 0.00403 228.760)
rounded: oklch(0.148 0.004 228.8)

All formats

HEX: #090b0c
RGB: rgb(9 11 12)
RGB (legacy): rgb(9, 11, 12)
HSL: hsl(200.00 14.29% 4.12%) → hsl(200 14% 4%)
HWB: hwb(200 4% 95%)
OKLCH: oklch(0.148 0.004 228.8) · oklch(14.8% 0.004 228.8)
OKLab: oklab(0.148 -0.003 -0.003)
Lab (D50): lab(2.92 -0.44 -0.61)
LCH (D50): lch(2.92 0.75 234.40)
Display P3: color(display-p3 0.0367 0.0429 0.0466)
Linear sRGB: color(srgb-linear 0.0027 0.0033 0.0037)

Gamut: sRGB and Display P3

#090B0C is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.029 and Display P3 reaches 0.038; this color uses 14% of the sRGB chroma available.

CSS snippets

.element {
  color: #090b0c;
  color: rgb(9 11 12);
  color: hsl(200 14% 4%);
  color: oklch(0.148 0.004 228.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.148 0.004 228.8);
}
/* arbitrary values */
class="text-[#090b0c] bg-[oklch(0.148_0.004_228.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0367 0.0429 0.0466); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #090b0c 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

#161819 · oklch(0.208 0.004 228.8) · ΔL +0.06
#020203 · oklch(0.088 0.004 228.8) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?