HEX to OKLCH: #164E63

Result

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. 1. sRGB → linear

   R: 22/255 = 0.08627 → 0.008023  (((x + 0.055) / 1.055)^2.4)
   G: 78/255 = 0.30588 → 0.076185  (((x + 0.055) / 1.055)^2.4)
   B: 99/255 = 0.38824 → 0.124772  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.050587
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.066960
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.100775

3. 3. cube root

   l′ = ∛0.050587 = 0.369839
   m′ = ∛0.066960 = 0.406073
   s′ = ∛0.100775 = 0.465355

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.39821
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.04496
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.04888

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.06641
   H = atan2(b, a) = 227.392°
   L = 0.39821

6. 6. OKLCH

   oklch(0.39821 0.06641 227.392)
   rounded: oklch(0.398 0.066 227.4)

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).

• cyan-900#104E64
• v3 sky-900#0C4A6E
• sky-900#024A70
• darkslategray#2F4F4F
• v3 teal-900#134E4A
• slate-700#314158
• teal-900#0B4F4A
• v3 slate-700#334155

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