HEX to OKLCH: #00A6F4

Also known as: Tailwind sky-500

#00A6F4 → oklch(0.692 0.160 240.4)

Values are shown at full precision, so converting back gives exactly #00a6f4. 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. sRGB → linear

R: 0/255 = 0.00000 → 0.000000  (÷ 12.92)
G: 166/255 = 0.65098 → 0.381326  (((x + 0.055) / 1.055)^2.4)
B: 244/255 = 0.95686 → 0.904661  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.251059
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.356726
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.677344

3. cube root

l′ = ∛0.251059 = 0.630849
m′ = ∛0.356726 = 0.709216
s′ = ∛0.677344 = 0.878220

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.69203
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.07886
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.13870

5. Oklab → OKLCH

C = √(a² + b²) = 0.15955
H = atan2(b, a) = 240.379°
L = 0.69203

6. OKLCH

oklch(0.69203 0.15955 240.379)
rounded: oklch(0.692 0.160 240.4)

All formats

HEX: #00a6f4
RGB: rgb(0 166 244)
RGB (legacy): rgb(0, 166, 244)
HSL: hsl(199.18 100.00% 47.84%) → hsl(199 100% 48%)
HWB: hwb(199 0% 4%)
OKLCH: oklch(0.692 0.160 240.4) · oklch(69.2% 0.160 240.4)
OKLab: oklab(0.692 -0.079 -0.139)
Lab (D50): lab(64.02 -15.26 -49.83)
LCH (D50): lch(64.02 52.12 252.97)
Display P3: color(display-p3 0.2886 0.6411 0.9316)
Linear sRGB: color(srgb-linear 0.0000 0.3813 0.9047)

Gamut: sRGB and Display P3

#00A6F4 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.160 and Display P3 reaches 0.194; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #00a6f4;
  color: rgb(0 166 244);
  color: hsl(199 100% 48%);
  color: oklch(0.692 0.160 240.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.692 0.160 240.4);
}
/* arbitrary values */
class="text-[#00a6f4] bg-[oklch(0.692_0.160_240.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2886 0.6411 0.9316); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #00a6f4 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

#30B9FF · oklch(0.752 0.160 240.4) · ΔL +0.06
#0093E0 · oklch(0.632 0.160 240.4) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?