OKLCH to HEX: #6B21A8

Result

Values are shown at full precision, so converting back gives exactly #6b21a8. 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. 1. input

   oklch(0.43828 0.19833 303.724)

2. 2. OKLCH → Oklab

   a = C·cos H = 0.11011
   b = C·sin H = -0.16496

3. 3. Oklab → LMS′

   l′ = L + 0.3963·a + 0.2158·b = 0.446323
   m′ = L − 0.1056·a − 0.0639·b = 0.437190
   s′ = L − 0.0895·a − 1.2915·b = 0.641464

4. 4. cube

   l = 0.446323³ = 0.088910
   m = 0.437190³ = 0.083562
   s = 0.641464³ = 0.263947

5. 5. LMS → linear sRGB

   R = 4.0767·l − 3.3077·m + 0.2310·s = 0.147026
   G = −1.2684·l + 2.6098·m − 0.3413·s = 0.015210
   B = −0.0042·l − 0.7034·m + 1.7076·s = 0.391568

6. 6. linear → sRGB, × 255

   R = 0.41961 × 255 = 107.00 → 107
   G = 0.12942 × 255 = 33.00 → 33
   B = 0.65882 × 255 = 168.00 → 168

7. 7. RGB → HEX

   #6B21A8

All formats

HEX

#6b21a8

RGB

rgb(107 33 168)

RGB (legacy)

rgb(107, 33, 168)

HSL

hsl(272.89 67.16% 39.41%) → hsl(273 67% 39%)

HWB

hwb(273 13% 34%)

OKLCH

oklch(0.438 0.198 303.7) · oklch(43.8% 0.198 303.7)

OKLab

oklab(0.438 0.110 -0.165)

Lab (D50)

lab(31.20 50.29 -58.65)

LCH (D50)

lch(31.20 77.26 310.61)

Display P3

color(display-p3 0.3865 0.1499 0.6344)

Linear sRGB

color(srgb-linear 0.1470 0.0152 0.3916)

Gamut: sRGB and Display P3

#6B21A8 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 0.240; this color uses 87% of the sRGB chroma available.

CSS snippets

.element {
  color: #6b21a8;
  color: rgb(107 33 168);
  color: hsl(273 67% 39%);
  color: oklch(0.438 0.198 303.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.438 0.198 303.7);
}
/* arbitrary values */
class="text-[#6b21a8] bg-[oklch(0.438_0.198_303.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3865 0.1499 0.6344); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #6b21a8 calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• purple-800#6E11B0
• rebeccapurple#663399
• v3 violet-800#5B21B6
• violet-800#5D0EC0
• purple-900#59168B
• v3 purple-900#581C87
• violet-900#4D179A
• v3 purple-700#7E22CE

Lighter and darker, same hue and chroma

• #7C37BC · oklch(0.498 0.198 303.7) · ΔL +0.06
• #5A0094 · oklch(0.378 0.198 303.7) · ΔL −0.06

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