HEX to RGB: #00008B

Also known as: CSS darkblue

#00008B → rgb(0 0 139)

Values are shown at full precision, so converting back gives exactly #00008b. 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. HEX → pairs
```
#00008B → 00 | 00 | 8B
```

2. base 16 → base 10

R = 00₁₆ = 0×16 + 0 = 0
G = 00₁₆ = 0×16 + 0 = 0
B = 8B₁₆ = 8×16 + 11 = 139

3. RGB
```
rgb(0 0 139)
```

All formats

HEX: #00008b
RGB: rgb(0 0 139)
RGB (legacy): rgb(0, 0, 139)
HSL: hsl(240.00 100.00% 27.25%) → hsl(240 100% 27%)
HWB: hwb(240 0% 45%)
OKLCH: oklch(0.288 0.199 264.1) · oklch(28.8% 0.199 264.1)
OKLab: oklab(0.288 -0.021 -0.198)
Lab (D50): lab(13.02 43.48 -71.34)
LCH (D50): lch(13.02 83.54 301.36)
Display P3: color(display-p3 0.0000 0.0000 0.5221)
Linear sRGB: color(srgb-linear 0.0000 0.0000 0.2582)

Gamut: sRGB and Display P3

#00008B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.169 and Display P3 reaches 0.199; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #00008b;
  color: rgb(0 0 139);
  color: hsl(240 100% 27%);
  color: oklch(0.288 0.199 264.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.288 0.199 264.1);
}
/* arbitrary values */
class="text-[#00008b] bg-[oklch(0.288_0.199_264.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0000 0.0000 0.5221); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #00008b 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

#01219F · oklch(0.348 0.199 264.1) · ΔL +0.06
#060077 · oklch(0.228 0.199 264.1) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

All converters →

Guides: What is OKLCH?