HEX to HSL: #1E3A8A

Also known as: Tailwind v3 blue-900

#1E3A8A → hsl(224 64% 33%)

Values are shown at full precision, so converting back gives exactly #1e3a8a. 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. RGB ÷ 255
```
R = 0.1176
G = 0.2275
B = 0.5412
```

2. max, min, Δ

max = 0.5412
min = 0.1176
Δ = max − min = 0.4235

3. L
```
L = (max + min) / 2 = 0.3294 = 32.94%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.6429 = 64.29%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.1176 − 0.2275) / 0.4235 + 4) = 224.44°

6. HSL
```
hsl(224.44 64.29% 32.94%)
```

All formats

HEX: #1e3a8a
RGB: rgb(30 58 138)
RGB (legacy): rgb(30, 58, 138)
HSL: hsl(224.44 64.29% 32.94%) → hsl(224 64% 33%)
HWB: hwb(224 12% 46%)
OKLCH: oklch(0.379 0.138 265.5) · oklch(37.9% 0.138 265.5)
OKLab: oklab(0.379 -0.011 -0.137)
Lab (D50): lab(26.34 13.76 -48.67)
LCH (D50): lch(26.34 50.58 285.79)
Display P3: color(display-p3 0.1437 0.2247 0.5217)
Linear sRGB: color(srgb-linear 0.0130 0.0423 0.2542)

Gamut: sRGB and Display P3

#1E3A8A is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.259 and Display P3 reaches 0.259; this color uses 53% of the sRGB chroma available.

CSS snippets

.element {
  color: #1e3a8a;
  color: rgb(30 58 138);
  color: hsl(224 64% 33%);
  color: oklch(0.379 0.138 265.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.379 0.138 265.5);
}
/* arbitrary values */
class="text-[#1e3a8a] bg-[oklch(0.379_0.138_265.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1437 0.2247 0.5217); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #1e3a8a 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

#2D4C9D · oklch(0.439 0.138 265.5) · ΔL +0.06
#102877 · oklch(0.319 0.138 265.5) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

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Guides: What is OKLCH?