HSL to HEX: #581C87

Also known as: Tailwind v3 purple-900

hsl(273.64 65.64% 31.96%) → #581C87

Values are shown at full precision, so converting back gives exactly #581c87. 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. input
```
H = 273.64°, S = 65.64%, L = 31.96%
```
2. C
```
C = (1 − |2L − 1|) × S = 0.41957
```

3. X

X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.23524   (H / 60° = 4.5607, sector 4)

4. m
```
m = L − C / 2 = 0.10981
```

5. (R′, G′, B′) + m

(R′, G′, B′) = (0.23524, 0.00000, 0.41957)
R = round((0.23524 + 0.10981) × 255) = 88
G = round((0.00000 + 0.10981) × 255) = 28
B = round((0.41957 + 0.10981) × 255) = 135

6. RGB → HEX
```
#581C87
```

All formats

HEX: #581c87
RGB: rgb(88 28 135)
RGB (legacy): rgb(88, 28, 135)
HSL: hsl(273.64 65.64% 31.96%) → hsl(274 66% 32%)
HWB: hwb(274 11% 47%)
OKLCH: oklch(0.381 0.166 305.0) · oklch(38.1% 0.166 305.0)
OKLab: oklab(0.381 0.095 -0.136)
Lab (D50): lab(25.18 42.12 -48.39)
LCH (D50): lch(25.18 64.15 311.03)
Display P3: color(display-p3 0.3177 0.1256 0.5097)
Linear sRGB: color(srgb-linear 0.0976 0.0116 0.2423)

Gamut: sRGB and Display P3

#581C87 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.198 and Display P3 reaches 0.208; this color uses 84% of the sRGB chroma available.

CSS snippets

.element {
  color: #581c87;
  color: rgb(88 28 135);
  color: hsl(274 66% 32%);
  color: oklch(0.381 0.166 305.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.381 0.166 305.0);
}
/* arbitrary values */
class="text-[#581c87] bg-[oklch(0.381_0.166_305.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3177 0.1256 0.5097); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #581c87 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

#69309A · oklch(0.441 0.166 305.0) · ΔL +0.06
#480074 · oklch(0.321 0.166 305.0) · 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?