HEX to OKLCH: #4682B4

Also known as: CSS steelblue

#4682B4 → oklch(0.588 0.099 245.7)

Values are shown at full precision, so converting back gives exactly #4682b4. 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: 70/255 = 0.27451 → 0.061246  (((x + 0.055) / 1.055)^2.4)
G: 130/255 = 0.50980 → 0.223228  (((x + 0.055) / 1.055)^2.4)
B: 180/255 = 0.70588 → 0.456411  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.168452
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.213947
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.355825

3. cube root

l′ = ∛0.168452 = 0.552279
m′ = ∛0.213947 = 0.598093
s′ = ∛0.355825 = 0.708618

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.58800
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.04082
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.09057

5. Oklab → OKLCH

C = √(a² + b²) = 0.09934
H = atan2(b, a) = 245.739°
L = 0.58800

6. OKLCH

oklch(0.58800 0.09934 245.739)
rounded: oklch(0.588 0.099 245.7)

All formats

HEX: #4682b4
RGB: rgb(70 130 180)
RGB (legacy): rgb(70, 130, 180)
HSL: hsl(207.27 44.00% 49.02%) → hsl(207 44% 49%)
HWB: hwb(207 27% 29%)
OKLCH: oklch(0.588 0.099 245.7) · oklch(58.8% 0.099 245.7)
OKLab: oklab(0.588 -0.041 -0.091)
Lab (D50): lab(51.99 -8.36 -32.83)
LCH (D50): lch(51.99 33.88 255.71)
Display P3: color(display-p3 0.3318 0.5041 0.6892)
Linear sRGB: color(srgb-linear 0.0612 0.2232 0.4564)

Gamut: sRGB and Display P3

#4682B4 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.150 and Display P3 reaches 0.195; this color uses 66% of the sRGB chroma available.

CSS snippets

.element {
  color: #4682b4;
  color: rgb(70 130 180);
  color: hsl(207 44% 49%);
  color: oklch(0.588 0.099 245.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.588 0.099 245.7);
}
/* arbitrary values */
class="text-[#4682b4] bg-[oklch(0.588_0.099_245.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3318 0.5041 0.6892); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #4682b4 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

#5894C7 · oklch(0.648 0.099 245.7) · ΔL +0.06
#3470A1 · oklch(0.528 0.099 245.7) · ΔL −0.06

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