HEX to HSL: #ADD8E6

Also known as: CSS lightblue

#ADD8E6 → hsl(195 53% 79%)

Values are shown at full precision, so converting back gives exactly #add8e6. 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 = 0.6784
G = 0.8471
B = 0.9020
```

2. max, min, Δ

max = 0.9020
min = 0.6784
Δ = max − min = 0.2235

3. L
```
L = (max + min) / 2 = 0.7902 = 79.02%
```

4. S

S = Δ / (1 − |2L − 1|) = 0.5327 = 53.27%

5. H

max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.6784 − 0.8471) / 0.2235 + 4) = 194.74°

6. HSL
```
hsl(194.74 53.27% 79.02%)
```

All formats

HEX: #add8e6
RGB: rgb(173 216 230)
RGB (legacy): rgb(173, 216, 230)
HSL: hsl(194.74 53.27% 79.02%) → hsl(195 53% 79%)
HWB: hwb(195 68% 10%)
OKLCH: oklch(0.856 0.049 219.7) · oklch(85.6% 0.049 219.7)
OKLab: oklab(0.856 -0.038 -0.031)
Lab (D50): lab(83.61 -12.23 -11.78)
LCH (D50): lch(83.61 16.98 223.94)
Display P3: color(display-p3 0.7122 0.8422 0.8949)
Linear sRGB: color(srgb-linear 0.4179 0.6867 0.7913)

Gamut: sRGB and Display P3

#ADD8E6 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.105 and Display P3 reaches 0.114; this color uses 47% of the sRGB chroma available.

CSS snippets

.element {
  color: #add8e6;
  color: rgb(173 216 230);
  color: hsl(195 53% 79%);
  color: oklch(0.856 0.049 219.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.856 0.049 219.7);
}
/* arbitrary values */
class="text-[#add8e6] bg-[oklch(0.856_0.049_219.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.7122 0.8422 0.8949); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #add8e6 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

#C0ECFA · oklch(0.916 0.049 219.7) · ΔL +0.06
#9AC5D2 · oklch(0.796 0.049 219.7) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?