HSL to HEX: #ECFEFF

Also known as: Tailwind cyan-50, Tailwind v3 cyan-50

hsl(183.16 100.00% 96.27%) → #ECFEFF

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. input
```
H = 183.16°, S = 100.00%, L = 96.27%
```
2. C
```
C = (1 − |2L − 1|) × S = 0.07460
```

3. X

X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.07067   (H / 60° = 3.0527, sector 3)

4. m
```
m = L − C / 2 = 0.92540
```

5. (R′, G′, B′) + m

(R′, G′, B′) = (0.00000, 0.07067, 0.07460)
R = round((0.00000 + 0.92540) × 255) = 236
G = round((0.07067 + 0.92540) × 255) = 254
B = round((0.07460 + 0.92540) × 255) = 255

6. RGB → HEX
```
#ECFEFF
```

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).

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

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

All converters →

Guides: What is OKLCH?