HSL to HEX: #09090B

Result

Values are shown at full precision, so converting back gives exactly #09090b. 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. 1. input

   H = 240.00°, S = 10.00%, L = 3.92%

2. 2. C

   C = (1 − |2L − 1|) × S = 0.00784

3. 3. X

   X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.00000   (H / 60° = 4.0000, sector 4)

4. 4. m

   m = L − C / 2 = 0.03528

5. 5. (R′, G′, B′) + m

   (R′, G′, B′) = (0.00000, 0.00000, 0.00784)
   R = round((0.00000 + 0.03528) × 255) = 9
   G = round((0.00000 + 0.03528) × 255) = 9
   B = round((0.00784 + 0.03528) × 255) = 11

6. 6. RGB → HEX

   #09090B

All formats

HEX

#09090b

RGB

rgb(9 9 11)

RGB (legacy)

rgb(9, 9, 11)

HSL

hsl(240.00 10.00% 3.92%) → hsl(240 10% 4%)

HWB

hwb(240 4% 96%)

OKLCH

oklch(0.141 0.004 285.8) · oklch(14.1% 0.004 285.8)

OKLab

oklab(0.141 0.001 -0.004)

Lab (D50)

lab(2.50 0.21 -0.77)

LCH (D50)

lch(2.50 0.80 285.25)

Display P3

color(display-p3 0.0353 0.0353 0.0425)

Linear sRGB

color(srgb-linear 0.0027 0.0027 0.0033)

Gamut: sRGB and Display P3

#09090B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.082 and Display P3 reaches 0.083; this color uses 5% of the sRGB chroma available.

CSS snippets

.element {
  color: #09090b;
  color: rgb(9 9 11);
  color: hsl(240 10% 4%);
  color: oklch(0.141 0.004 285.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.141 0.004 285.8);
}
/* arbitrary values */
class="text-[#09090b] bg-[oklch(0.141_0.004_285.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0353 0.0353 0.0425); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #09090b calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• neutral-950#0A0A0A
• mauve-950#0C090C
• mist-950#090B0C
• stone-950#0C0A09
• olive-950#0C0C09
• gray-950#030712
• v3 slate-950#020617
• slate-950#020618

Lighter and darker, same hue and chroma

• #161618 · oklch(0.201 0.004 285.8) · ΔL +0.06
• #020202 · oklch(0.081 0.004 285.8) · ΔL −0.06

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