HEX to OKLCH: #0EA5E9

Result

Values are shown at full precision, so converting back gives exactly #0ea5e9. 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: 14/255 = 0.05490 → 0.004391  (((x + 0.055) / 1.055)^2.4)
   G: 165/255 = 0.64706 → 0.376262  (((x + 0.055) / 1.055)^2.4)
   B: 233/255 = 0.91373 → 0.814847  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.245532
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.344564
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.619724

3. 3. cube root

   l′ = ∛0.245532 = 0.626185
   m′ = ∛0.344564 = 0.701062
   s′ = ∛0.619724 = 0.852575

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.68469
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.07984
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.12446

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.14787
   H = atan2(b, a) = 237.323°
   L = 0.68469

6. 6. OKLCH

   oklch(0.68469 0.14787 237.323)
   rounded: oklch(0.685 0.148 237.3)

All formats

HEX

#0ea5e9

RGB

rgb(14 165 233)

RGB (legacy)

rgb(14, 165, 233)

HSL

hsl(198.63 88.66% 48.43%) → hsl(199 89% 48%)

HWB

hwb(199 5% 9%)

OKLCH

oklch(0.685 0.148 237.3) · oklch(68.5% 0.148 237.3)

OKLab

oklab(0.685 -0.080 -0.124)

Lab (D50)

lab(63.35 -17.61 -44.86)

LCH (D50)

lch(63.35 48.19 248.57)

Display P3

color(display-p3 0.2942 0.6374 0.8908)

Linear sRGB

color(srgb-linear 0.0044 0.3763 0.8148)

Gamut: sRGB and Display P3

#0EA5E9 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.150 and Display P3 reaches 0.197; this color uses 98% of the sRGB chroma available.

CSS snippets

.element {
  color: #0ea5e9;
  color: rgb(14 165 233);
  color: hsl(199 89% 48%);
  color: oklch(0.685 0.148 237.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.685 0.148 237.3);
}
/* arbitrary values */
class="text-[#0ea5e9] bg-[oklch(0.685_0.148_237.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2942 0.6374 0.8908); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #0ea5e9 calc(l - 0.1) c h); }

Nearby colors

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

• sky-500#00A6F4
• blue-400#51A2FF
• v3 blue-400#60A5FA
• cornflowerblue#6495ED
• cyan-500#00B8DB
• v3 cyan-500#06B6D4
• sky-400#00BCFF
• v3 sky-400#38BDF8

Lighter and darker, same hue and chroma

• #34B8FD · oklch(0.745 0.148 237.3) · ΔL +0.06
• #0092D5 · oklch(0.625 0.148 237.3) · ΔL −0.06

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