HSL to HEX: #8B0000

Result

Values are shown at full precision, so converting back gives exactly #8b0000. 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 = 0.00°, S = 100.00%, L = 27.25%

2. 2. C

   C = (1 − |2L − 1|) × S = 0.54500

3. 3. X

   X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.00000   (H / 60° = 0.0000, sector 0)

4. 4. m

   m = L − C / 2 = 0.00000

5. 5. (R′, G′, B′) + m

   (R′, G′, B′) = (0.54500, 0.00000, 0.00000)
   R = round((0.54500 + 0.00000) × 255) = 139
   G = round((0.00000 + 0.00000) × 255) = 0
   B = round((0.00000 + 0.00000) × 255) = 0

6. 6. RGB → HEX

   #8B0000

All formats

HEX

#8b0000

RGB

rgb(139 0 0)

RGB (legacy)

rgb(139, 0, 0)

HSL

hsl(0.00 100.00% 27.25%) → hsl(0 100% 27%)

HWB

hwb(0 0% 45%)

OKLCH

oklch(0.400 0.164 29.2) · oklch(40.0% 0.164 29.2)

OKLab

oklab(0.400 0.143 0.080)

Lab (D50)

lab(28.76 51.45 42.80)

LCH (D50)

lch(28.76 66.93 39.75)

Display P3

color(display-p3 0.4982 0.0902 0.0551)

Linear sRGB

color(srgb-linear 0.2582 0.0000 0.0000)

Gamut: sRGB and Display P3

#8B0000 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.164 and Display P3 reaches 0.183; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #8b0000;
  color: rgb(139 0 0);
  color: hsl(0 100% 27%);
  color: oklch(0.400 0.164 29.2);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.400 0.164 29.2);
}
/* arbitrary values */
class="text-[#8b0000] bg-[oklch(0.400_0.164_29.2)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4982 0.0902 0.0551); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #8b0000 calc(l - 0.1) c h); }

Nearby colors

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

• maroon#800000
• red-900#82181A
• v3 red-900#7F1D1D
• v3 red-800#991B1B
• red-800#9F0712
• orange-900#7E2A0C
• v3 orange-900#7C2D12
• v3 rose-900#881337

Lighter and darker, same hue and chroma

• #9F2117 · oklch(0.460 0.164 29.2) · ΔL +0.06
• #770000 · oklch(0.340 0.164 29.2) · ΔL −0.06

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