OKLCH to HEX: #6366F1

Also known as: Tailwind v3 indigo-500

oklch(0.58540 0.20406 277.117) → #6366F1

Values are shown at full precision, so converting back gives exactly #6366f1. 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
```
oklch(0.58540 0.20406 277.117)
```

2. OKLCH → Oklab

a = C·cos H = 0.02528
b = C·sin H = -0.20249

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.551723
m′ = L − 0.1056·a − 0.0639·b = 0.595661
s′ = L − 0.0895·a − 1.2915·b = 0.844648

4. cube

l = 0.551723³ = 0.167943
m = 0.595661³ = 0.211348
s = 0.844648³ = 0.602597

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.124766
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.132862
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.879632

6. linear → sRGB, × 255

R = 0.38823 × 255 = 99.00 → 99
G = 0.39999 × 255 = 102.00 → 102
B = 0.94510 × 255 = 241.00 → 241

7. RGB → HEX
```
#6366F1
```

All formats

HEX: #6366f1
RGB: rgb(99 102 241)
RGB (legacy): rgb(99, 102, 241)
HSL: hsl(238.73 83.53% 66.67%) → hsl(239 84% 67%)
HWB: hwb(239 39% 5%)
OKLCH: oklch(0.585 0.204 277.1) · oklch(58.5% 0.204 277.1)
OKLab: oklab(0.585 0.025 -0.202)
Lab (D50): lab(49.05 30.34 -71.87)
LCH (D50): lch(49.05 78.02 292.89)
Display P3: color(display-p3 0.3904 0.3996 0.9126)
Linear sRGB: color(srgb-linear 0.1248 0.1329 0.8796)

Gamut: sRGB and Display P3

#6366F1 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.229 and Display P3 reaches 0.246; this color uses 89% of the sRGB chroma available.

CSS snippets

.element {
  color: #6366f1;
  color: rgb(99 102 241);
  color: hsl(239 84% 67%);
  color: oklch(0.585 0.204 277.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.585 0.204 277.1);
}
/* arbitrary values */
class="text-[#6366f1] bg-[oklch(0.585_0.204_277.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3904 0.3996 0.9126); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #6366f1 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

#7379FF · oklch(0.645 0.204 277.1) · ΔL +0.06
#5452DC · oklch(0.525 0.204 277.1) · 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?