HEX to OKLCH: #483D8B

Also known as: CSS darkslateblue

#483D8B → oklch(0.414 0.125 286.0)

Values are shown at full precision, so converting back gives exactly #483d8b. 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: 72/255 = 0.28235 → 0.064803  (((x + 0.055) / 1.055)^2.4)
G: 61/255 = 0.23922 → 0.046665  (((x + 0.055) / 1.055)^2.4)
B: 139/255 = 0.54510 → 0.258183  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.065024
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.073225
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.181518

3. cube root

l′ = ∛0.065024 = 0.402122
m′ = ∛0.073225 = 0.418363
s′ = ∛0.181518 = 0.566205

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.41434
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.03449
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.11998

5. Oklab → OKLCH

C = √(a² + b²) = 0.12484
H = atan2(b, a) = 286.039°
L = 0.41434

6. OKLCH

oklch(0.41434 0.12484 286.039)
rounded: oklch(0.414 0.125 286.0)

All formats

HEX: #483d8b
RGB: rgb(72 61 139)
RGB (legacy): rgb(72, 61, 139)
HSL: hsl(248.46 39.00% 39.22%) → hsl(248 39% 39%)
HWB: hwb(248 24% 45%)
OKLCH: oklch(0.414 0.125 286.0) · oklch(41.4% 0.125 286.0)
OKLab: oklab(0.414 0.034 -0.120)
Lab (D50): lab(30.28 21.41 -42.74)
LCH (D50): lch(30.28 47.81 296.61)
Display P3: color(display-p3 0.2753 0.2408 0.5267)
Linear sRGB: color(srgb-linear 0.0648 0.0467 0.2582)

Gamut: sRGB and Display P3

#483D8B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.240 and Display P3 reaches 0.245; this color uses 52% of the sRGB chroma available.

CSS snippets

.element {
  color: #483d8b;
  color: rgb(72 61 139);
  color: hsl(248 39% 39%);
  color: oklch(0.414 0.125 286.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.414 0.125 286.0);
}
/* arbitrary values */
class="text-[#483d8b] bg-[oklch(0.414_0.125_286.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2753 0.2408 0.5267); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #483d8b 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

#584E9E · oklch(0.474 0.125 286.0) · ΔL +0.06
#392C78 · oklch(0.354 0.125 286.0) · ΔL −0.06

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