HEX to OKLCH: #ECFEFF

Result

Values are shown at full precision, so converting back gives exactly #ecfeff. 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: 236/255 = 0.92549 → 0.838799  (((x + 0.055) / 1.055)^2.4)
   G: 254/255 = 0.99608 → 0.991102  (((x + 0.055) / 1.055)^2.4)
   B: 255/255 = 1.00000 → 1.000000  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.928777
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.959784
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.983259

3. 3. cube root

   l′ = ∛0.928777 = 0.975672
   m′ = ∛0.959784 = 0.986411
   s′ = ∛0.983259 = 0.994388

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.98412
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.01765
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.00673

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.01889
   H = atan2(b, a) = 200.873°
   L = 0.98412

6. 6. OKLCH

   oklch(0.98412 0.01889 200.873)
   rounded: oklch(0.984 0.019 200.9)

All formats

HEX

#ecfeff

RGB

rgb(236 254 255)

RGB (legacy)

rgb(236, 254, 255)

HSL

hsl(183.16 100.00% 96.27%) → hsl(183 100% 96%)

HWB

hwb(183 93% 0%)

OKLCH

oklch(0.984 0.019 200.9) · oklch(98.4% 0.019 200.9)

OKLab

oklab(0.984 -0.018 -0.007)

Lab (D50)

lab(98.34 -5.94 -2.61)

LCH (D50)

lch(98.34 6.49 203.69)

Display P3

color(display-p3 0.9385 0.9938 0.9985)

Linear sRGB

color(srgb-linear 0.8388 0.9911 1.0000)

Gamut: sRGB and Display P3

#ECFEFF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.019 and Display P3 reaches 0.020; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #ecfeff;
  color: rgb(236 254 255);
  color: hsl(183 100% 96%);
  color: oklch(0.984 0.019 200.9);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.984 0.019 200.9);
}
/* arbitrary values */
class="text-[#ecfeff] bg-[oklch(0.984_0.019_200.9)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9385 0.9938 0.9985); }
}

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

Nearby colors

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

• azure#F0FFFF
• teal-50#F0FDFA
• emerald-50#ECFDF5
• sky-50#F0F9FF
• mintcream#F5FFFA
• green-50#F0FDF4
• lightcyan#E0FFFF
• aliceblue#F0F8FF

Lighter and darker, same hue and chroma

• #F1FFFF · oklch(1.000 0.019 200.9) · ΔL +0.06
• #D8EAEB · oklch(0.924 0.019 200.9) · ΔL −0.06

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