OKLCH to HEX: #A78BFA

Also known as: Tailwind v3 violet-400

oklch(0.70897 0.15917 293.541) → #A78BFA

Values are shown at full precision, so converting back gives exactly #a78bfa. 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(0.70897 0.15917 293.541)
```

2. OKLCH → Oklab

a = C·cos H = 0.06357
b = C·sin H = -0.14592

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.702676
m′ = L − 0.1056·a − 0.0639·b = 0.711577
s′ = L − 0.0895·a − 1.2915·b = 0.891739

4. cube

l = 0.702676³ = 0.346948
m = 0.711577³ = 0.360301
s = 0.891739³ = 0.709109

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.386430
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.258183
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.955986

6. linear → sRGB, × 255

R = 0.65490 × 255 = 167.00 → 167
G = 0.54510 × 255 = 139.00 → 139
B = 0.98040 × 255 = 250.00 → 250

7. RGB → HEX
```
#A78BFA
```

All formats

HEX: #a78bfa
RGB: rgb(167 139 250)
RGB (legacy): rgb(167, 139, 250)
HSL: hsl(255.14 91.74% 76.27%) → hsl(255 92% 76%)
HWB: hwb(255 55% 2%)
OKLCH: oklch(0.709 0.159 293.5) · oklch(70.9% 0.159 293.5)
OKLab: oklab(0.709 0.064 -0.146)
Lab (D50): lab(64.08 29.18 -52.44)
LCH (D50): lch(64.08 60.01 299.10)
Display P3: color(display-p3 0.6372 0.5492 0.9527)
Linear sRGB: color(srgb-linear 0.3864 0.2582 0.9560)

Gamut: sRGB and Display P3

#A78BFA 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 0.183; this color uses 94% of the sRGB chroma available.

CSS snippets

.element {
  color: #a78bfa;
  color: rgb(167 139 250);
  color: hsl(255 92% 76%);
  color: oklch(0.709 0.159 293.5);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.709 0.159 293.5);
}
/* arbitrary values */
class="text-[#a78bfa] bg-[oklch(0.709_0.159_293.5)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6372 0.5492 0.9527); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a78bfa 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

#BA9EFF · oklch(0.769 0.159 293.5) · ΔL +0.06
#9578E5 · oklch(0.649 0.159 293.5) · 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?