HEX to OKLCH: #00BCFF

Also known as: Tailwind sky-400

#00BCFF → oklch(0.748 0.155 233.3)

Values are shown at full precision, so converting back gives exactly #00bcff. 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: 188/255 = 0.73725 → 0.502886  (((x + 0.055) / 1.055)^2.4)
B: 255/255 = 1.00000 → 1.000000  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.321160
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.449712
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.771651

3. cube root

l′ = ∛0.321160 = 0.684816
m′ = ∛0.449712 = 0.766146
s′ = ∛0.771651 = 0.917220

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.74841
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.09280
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.12428

5. Oklab → OKLCH

C = √(a² + b²) = 0.15510
H = atan2(b, a) = 233.252°
L = 0.74841

6. OKLCH

oklch(0.74841 0.15510 233.252)
rounded: oklch(0.748 0.155 233.3)

All formats

HEX: #00bcff
RGB: rgb(0 188 255)
RGB (legacy): rgb(0, 188, 255)
HSL: hsl(195.76 100.00% 50.00%) → hsl(196 100% 50%)
HWB: hwb(196 0% 0%)
OKLCH: oklch(0.748 0.155 233.3) · oklch(74.8% 0.155 233.3)
OKLab: oklab(0.748 -0.093 -0.124)
Lab (D50): lab(70.95 -22.67 -44.93)
LCH (D50): lch(70.95 50.33 243.23)
Display P3: color(display-p3 0.3305 0.7262 0.9763)
Linear sRGB: color(srgb-linear 0.0000 0.5029 1.0000)

Gamut: sRGB and Display P3

#00BCFF 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 0.168; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #00bcff;
  color: rgb(0 188 255);
  color: hsl(196 100% 50%);
  color: oklch(0.748 0.155 233.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.748 0.155 233.3);
}
/* arbitrary values */
class="text-[#00bcff] bg-[oklch(0.748_0.155_233.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3305 0.7262 0.9763); }
}

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

#34D0FF · oklch(0.808 0.155 233.3) · ΔL +0.06
#00A9EB · oklch(0.688 0.155 233.3) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?