OKLCH to HEX: #372AAC

Result

Values are shown at full precision, so converting back gives exactly #372aac. 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(0.39877 0.19487 277.320)

2. 2. OKLCH → Oklab

   a = C·cos H = 0.02483
   b = C·sin H = -0.19328

3. 3. Oklab → LMS′

   l′ = L + 0.3963·a + 0.2158·b = 0.366900
   m′ = L − 0.1056·a − 0.0639·b = 0.408491
   s′ = L − 0.0895·a − 1.2915·b = 0.646169

4. 4. cube

   l = 0.366900³ = 0.049390
   m = 0.408491³ = 0.068163
   s = 0.646169³ = 0.269798

5. 5. LMS → linear sRGB

   R = 4.0767·l − 3.3077·m + 0.2310·s = 0.038204
   G = −1.2684·l + 2.6098·m − 0.3413·s = 0.023153
   B = −0.0042·l − 0.7034·m + 1.7076·s = 0.412556

6. 6. linear → sRGB, × 255

   R = 0.21568 × 255 = 55.00 → 55
   G = 0.16470 × 255 = 42.00 → 42
   B = 0.67452 × 255 = 172.00 → 172

7. 7. RGB → HEX

   #372AAC

All formats

HEX

#372aac

RGB

rgb(55 42 172)

RGB (legacy)

rgb(55, 42, 172)

HSL

hsl(246.00 60.75% 41.96%) → hsl(246 61% 42%)

HWB

hwb(246 16% 33%)

OKLCH

oklch(0.399 0.195 277.3) · oklch(39.9% 0.195 277.3)

OKLab

oklab(0.399 0.025 -0.193)

Lab (D50)

lab(26.77 37.84 -68.60)

LCH (D50)

lch(26.77 78.34 298.88)

Display P3

color(display-p3 0.2076 0.1667 0.6484)

Linear sRGB

color(srgb-linear 0.0382 0.0232 0.4125)

Gamut: sRGB and Display P3

#372AAC is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.246 and Display P3 reaches 0.249; this color uses 79% of the sRGB chroma available.

CSS snippets

.element {
  color: #372aac;
  color: rgb(55 42 172);
  color: hsl(246 61% 42%);
  color: oklch(0.399 0.195 277.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.399 0.195 277.3);
}
/* arbitrary values */
class="text-[#372aac] bg-[oklch(0.399_0.195_277.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2076 0.1667 0.6484); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #372aac calc(l - 0.1) c h); }

Nearby colors

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

• v3 indigo-800#3730A3
• blue-800#193CB8
• v3 blue-800#1E40AF
• violet-900#4D179A
• v3 violet-900#4C1D95
• v3 indigo-700#4338CA
• blue-900#1C398E
• indigo-900#312C85

Lighter and darker, same hue and chroma

• #443FC0 · oklch(0.459 0.195 277.3) · ΔL +0.06
• #2B1098 · oklch(0.339 0.195 277.3) · ΔL −0.06

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