HEX to HSL: #87CEFA

Also known as: CSS lightskyblue

#87CEFA → hsl(203 92% 75%)

Values are shown at full precision, so converting back gives exactly #87cefa. 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. RGB ÷ 255
```
R = 0.5294
G = 0.8078
B = 0.9804
```

2. max, min, Δ

max = 0.9804
min = 0.5294
Δ = max − min = 0.4510

3. L
```
L = (max + min) / 2 = 0.7549 = 75.49%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.9200 = 92.00%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.5294 − 0.8078) / 0.4510 + 4) = 202.96°

6. HSL
```
hsl(202.96 92.00% 75.49%)
```

All formats

HEX: #87cefa
RGB: rgb(135 206 250)
RGB (legacy): rgb(135, 206, 250)
HSL: hsl(202.96 92.00% 75.49%) → hsl(203 92% 75%)
HWB: hwb(203 53% 2%)
OKLCH: oklch(0.821 0.095 236.8) · oklch(82.1% 0.095 236.8)
OKLab: oklab(0.821 -0.052 -0.079)
Lab (D50): lab(79.29 -14.43 -29.10)
LCH (D50): lch(79.29 32.48 243.62)
Display P3: color(display-p3 0.5916 0.8006 0.9636)
Linear sRGB: color(srgb-linear 0.2423 0.6172 0.9560)

Gamut: sRGB and Display P3

#87CEFA is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.104 and Display P3 reaches 0.113; this color uses 91% of the sRGB chroma available.

CSS snippets

.element {
  color: #87cefa;
  color: rgb(135 206 250);
  color: hsl(203 92% 75%);
  color: oklch(0.821 0.095 236.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.821 0.095 236.8);
}
/* arbitrary values */
class="text-[#87cefa] bg-[oklch(0.821_0.095_236.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5916 0.8006 0.9636); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #87cefa 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

#9AE2FF · oklch(0.881 0.095 236.8) · ΔL +0.06
#74BBE6 · oklch(0.761 0.095 236.8) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?