HEX to HSL: #87CEEB

Also known as: CSS skyblue

#87CEEB → hsl(197 71% 73%)

Values are shown at full precision, so converting back gives exactly #87ceeb. 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 = 0.9216
```

2. max, min, Δ

max = 0.9216
min = 0.5294
Δ = max − min = 0.3922

3. L
```
L = (max + min) / 2 = 0.7255 = 72.55%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.7143 = 71.43%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.5294 − 0.8078) / 0.3922 + 4) = 197.40°

6. HSL
```
hsl(197.40 71.43% 72.55%)
```

All formats

HEX: #87ceeb
RGB: rgb(135 206 235)
RGB (legacy): rgb(135, 206, 235)
HSL: hsl(197.40 71.43% 72.55%) → hsl(197 71% 73%)
HWB: hwb(197 53% 8%)
OKLCH: oklch(0.815 0.082 225.8) · oklch(81.5% 0.082 225.8)
OKLab: oklab(0.815 -0.057 -0.059)
Lab (D50): lab(78.85 -17.54 -21.79)
LCH (D50): lch(78.85 27.97 231.17)
Display P3: color(display-p3 0.5916 0.8006 0.9090)
Linear sRGB: color(srgb-linear 0.2423 0.6172 0.8308)

Gamut: sRGB and Display P3

#87CEEB is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.123 and Display P3 reaches 0.134; this color uses 66% of the sRGB chroma available.

CSS snippets

.element {
  color: #87ceeb;
  color: rgb(135 206 235);
  color: hsl(197 71% 73%);
  color: oklch(0.815 0.082 225.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.815 0.082 225.8);
}
/* arbitrary values */
class="text-[#87ceeb] bg-[oklch(0.815_0.082_225.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5916 0.8006 0.9090); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #87ceeb 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(0.875 0.082 225.8) · ΔL +0.06
#74BBD7 · oklch(0.755 0.082 225.8) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

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Guides: What is OKLCH?