HSL to HEX: #18181B

Result

Values are shown at full precision, so converting back gives exactly #18181b. 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 = 5.88%, L = 10.00%

2. 2. C

   C = (1 − |2L − 1|) × S = 0.01176

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 = 0.09412

5. 5. (R′, G′, B′) + m

   (R′, G′, B′) = (0.00000, 0.00000, 0.01176)
   R = round((0.00000 + 0.09412) × 255) = 24
   G = round((0.00000 + 0.09412) × 255) = 24
   B = round((0.01176 + 0.09412) × 255) = 27

6. 6. RGB → HEX

   #18181B

All formats

HEX

#18181b

RGB

rgb(24 24 27)

RGB (legacy)

rgb(24, 24, 27)

HSL

hsl(240.00 5.88% 10.00%) → hsl(240 6% 10%)

HWB

hwb(240 9% 89%)

OKLCH

oklch(0.210 0.006 285.9) · oklch(21.0% 0.006 285.9)

OKLab

oklab(0.210 0.002 -0.006)

Lab (D50)

lab(8.35 0.60 -2.12)

LCH (D50)

lch(8.35 2.20 285.90)

Display P3

color(display-p3 0.0941 0.0941 0.1049)

Linear sRGB

color(srgb-linear 0.0091 0.0091 0.0110)

Gamut: sRGB and Display P3

#18181B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.122 and Display P3 reaches 0.125; this color uses 5% of the sRGB chroma available.

CSS snippets

.element {
  color: #18181b;
  color: rgb(24 24 27);
  color: hsl(240 6% 10%);
  color: oklch(0.210 0.006 285.9);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.210 0.006 285.9);
}
/* arbitrary values */
class="text-[#18181b] bg-[oklch(0.210_0.006_285.9)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0941 0.0941 0.1049); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #18181b calc(l - 0.1) c h); }

Nearby colors

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

• neutral-900#171717
• mist-900#161B1D
• stone-900#1C1917
• taupe-900#1D1816
• mauve-900#1D161E
• olive-900#1D1D16
• v3 gray-900#111827
• gray-900#101828

Lighter and darker, same hue and chroma

• #262629 · oklch(0.270 0.006 285.9) · ΔL +0.06
• #0B0B0E · oklch(0.150 0.006 285.9) · ΔL −0.06

Open in the studio