HEX to HSL: #00FFFF

Also known as: CSS aqua, CSS cyan

#00FFFF → hsl(180 100% 50%)

Values are shown at full precision, so converting back gives exactly #00ffff. 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 = 0.0000
G = 1.0000
B = 1.0000
```

2. max, min, Δ

max = 1.0000
min = 0.0000
Δ = max − min = 1.0000

3. L
```
L = (max + min) / 2 = 0.5000 = 50.00%
```

4. S

S = Δ / (1 − |2L − 1|) = 1.0000 = 100.00%

5. H

max is G → H = 60° × ((B − R) / Δ + 2) = 60° × ((1.0000 − 0.0000) / 1.0000 + 2) = 180.00°

6. HSL
```
hsl(180.00 100.00% 50.00%)
```

All formats

HEX: #00ffff
RGB: rgb(0 255 255)
RGB (legacy): rgb(0, 255, 255)
HSL: hsl(180.00 100.00% 50.00%) → hsl(180 100% 50%)
HWB: hwb(180 0% 0%)
OKLCH: oklch(0.905 0.155 194.8) · oklch(90.5% 0.155 194.8)
OKLab: oklab(0.905 -0.149 -0.039)
Lab (D50): lab(90.67 -50.66 -14.96)
LCH (D50): lch(90.67 52.82 196.45)
Display P3: color(display-p3 0.4584 0.9853 0.9925)
Linear sRGB: color(srgb-linear 0.0000 1.0000 1.0000)

Gamut: sRGB and Display P3

#00FFFF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.155 and Display P3 reaches 0.165; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #00ffff;
  color: rgb(0 255 255);
  color: hsl(180 100% 50%);
  color: oklch(0.905 0.155 194.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.905 0.155 194.8);
}
/* arbitrary values */
class="text-[#00ffff] bg-[oklch(0.905_0.155_194.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4584 0.9853 0.9925); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #00ffff 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

#41FFFF · oklch(0.965 0.155 194.8) · ΔL +0.06
#00EBEB · oklch(0.845 0.155 194.8) · 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?