HEX to RGB: #0F172A

Result

Values are shown at full precision, so converting back gives exactly #0f172a. 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. HEX → pairs

   #0F172A → 0F | 17 | 2A

2. 2. base 16 → base 10

   R = 0F₁₆ = 0×16 + 15 = 15
   G = 17₁₆ = 1×16 + 7 = 23
   B = 2A₁₆ = 2×16 + 10 = 42

3. 3. RGB

   rgb(15 23 42)

All formats

HEX

#0f172a

RGB

rgb(15 23 42)

RGB (legacy)

rgb(15, 23, 42)

HSL

hsl(222.22 47.37% 11.18%) → hsl(222 47% 11%)

HWB

hwb(222 6% 84%)

OKLCH

oklch(0.208 0.040 265.8) · oklch(20.8% 0.040 265.8)

OKLab

oklab(0.208 -0.003 -0.040)

Lab (D50)

lab(7.78 1.59 -14.30)

LCH (D50)

lch(7.78 14.38 276.34)

Display P3

color(display-p3 0.0653 0.0893 0.1592)

Linear sRGB

color(srgb-linear 0.0048 0.0086 0.0232)

Gamut: sRGB and Display P3

#0F172A is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.142 and Display P3 reaches 0.142; this color uses 28% of the sRGB chroma available.

CSS snippets

.element {
  color: #0f172a;
  color: rgb(15 23 42);
  color: hsl(222 47% 11%);
  color: oklch(0.208 0.040 265.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.208 0.040 265.8);
}
/* arbitrary values */
class="text-[#0f172a] bg-[oklch(0.208_0.040_265.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0653 0.0893 0.1592); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #0f172a calc(l - 0.1) c h); }

Nearby colors

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

• slate-900#0F172B
• gray-900#101828
• v3 gray-900#111827
• mauve-900#1D161E
• zinc-900#18181B
• mist-900#161B1D
• neutral-900#171717
• stone-900#1C1917

Lighter and darker, same hue and chroma

• #1D2539 · oklch(0.268 0.040 265.8) · ΔL +0.06
• #04091B · oklch(0.148 0.040 265.8) · ΔL −0.06

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