HEX to OKLCH: #ECFDF5

Result

Values are shown at full precision, so converting back gives exactly #ecfdf5. 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: 253/255 = 0.99216 → 0.982251  (((x + 0.055) / 1.055)^2.4)
   B: 245/255 = 0.96078 → 0.913099  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.919559
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.944426
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.926019

3. 3. cube root

   l′ = ∛0.919559 = 0.972433
   m′ = ∛0.944426 = 0.981121
   s′ = ∛0.926019 = 0.974705

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.97932
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.02008
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.00496

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.02068
   H = atan2(b, a) = 166.113°
   L = 0.97932

6. 6. OKLCH

   oklch(0.97932 0.02068 166.113)
   rounded: oklch(0.979 0.021 166.1)

All formats

HEX

#ecfdf5

RGB

rgb(236 253 245)

RGB (legacy)

rgb(236, 253, 245)

HSL

hsl(151.76 80.95% 95.88%) → hsl(152 81% 96%)

HWB

hwb(152 93% 1%)

OKLCH

oklch(0.979 0.021 166.1) · oklch(97.9% 0.021 166.1)

OKLab

oklab(0.979 -0.020 0.005)

Lab (D50)

lab(97.88 -6.84 1.83)

LCH (D50)

lch(97.88 7.08 165.06)

Display P3

color(display-p3 0.9378 0.9900 0.9625)

Linear sRGB

color(srgb-linear 0.8388 0.9823 0.9131)

Gamut: sRGB and Display P3

#ECFDF5 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.029 and Display P3 reaches 0.033; this color uses 71% of the sRGB chroma available.

CSS snippets

.element {
  color: #ecfdf5;
  color: rgb(236 253 245);
  color: hsl(152 81% 96%);
  color: oklch(0.979 0.021 166.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.979 0.021 166.1);
}
/* arbitrary values */
class="text-[#ecfdf5] bg-[oklch(0.979_0.021_166.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9378 0.9900 0.9625); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #ecfdf5 calc(l - 0.1) c h); }

Nearby colors

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

• green-50#F0FDF4
• teal-50#F0FDFA
• honeydew#F0FFF0
• cyan-50#ECFEFF
• azure#F0FFFF
• mintcream#F5FFFA
• lightcyan#E0FFFF
• mist-50#F9FBFB

Lighter and darker, same hue and chroma

• #F3FFFC · oklch(1.000 0.021 166.1) · ΔL +0.06
• #D8E9E1 · oklch(0.919 0.021 166.1) · ΔL −0.06

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