OKLCH to HEX: #164E63

Also known as: Tailwind v3 cyan-900

oklch(0.39821 0.06641 227.392) → #164E63

Values are shown at full precision, so converting back gives exactly #164e63. 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(0.39821 0.06641 227.392)
```

2. OKLCH → Oklab

a = C·cos H = -0.04496
b = C·sin H = -0.04888

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.369843
m′ = L − 0.1056·a − 0.0639·b = 0.406077
s′ = L − 0.0895·a − 1.2915·b = 0.465358

4. cube

l = 0.369843³ = 0.050589
m = 0.406077³ = 0.066961
s = 0.465358³ = 0.100777

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.008024
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.076187
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.124774

6. linear → sRGB, × 255

R = 0.08628 × 255 = 22.00 → 22
G = 0.30589 × 255 = 78.00 → 78
B = 0.38824 × 255 = 99.00 → 99

7. RGB → HEX
```
#164E63
```

All formats

HEX: #164e63
RGB: rgb(22 78 99)
RGB (legacy): rgb(22, 78, 99)
HSL: hsl(196.36 63.64% 23.73%) → hsl(196 64% 24%)
HWB: hwb(196 9% 61%)
OKLCH: oklch(0.398 0.066 227.4) · oklch(39.8% 0.066 227.4)
OKLab: oklab(0.398 -0.045 -0.049)
Lab (D50): lab(30.39 -12.66 -17.86)
LCH (D50): lch(30.39 21.89 234.67)
Display P3: color(display-p3 0.1522 0.3014 0.3800)
Linear sRGB: color(srgb-linear 0.0080 0.0762 0.1248)

Gamut: sRGB and Display P3

#164E63 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.077 and Display P3 reaches 0.102; this color uses 86% of the sRGB chroma available.

CSS snippets

.element {
  color: #164e63;
  color: rgb(22 78 99);
  color: hsl(196 64% 24%);
  color: oklch(0.398 0.066 227.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.398 0.066 227.4);
}
/* arbitrary values */
class="text-[#164e63] bg-[oklch(0.398_0.066_227.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1522 0.3014 0.3800); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #164e63 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

#295F74 · oklch(0.458 0.066 227.4) · ΔL +0.06
#003E52 · oklch(0.338 0.066 227.4) · 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?