HEX to OKLCH: #8A2BE2

Also known as: CSS blueviolet

#8A2BE2 → oklch(0.534 0.250 301.4)

Values are shown at full precision, so converting back gives exactly #8a2be2. 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: 138/255 = 0.54118 → 0.254152  (((x + 0.055) / 1.055)^2.4)
G: 43/255 = 0.16863 → 0.024158  (((x + 0.055) / 1.055)^2.4)
B: 226/255 = 0.88627 → 0.760525  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.156849
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.151978
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.508362

3. cube root

l′ = ∛0.156849 = 0.539297
m′ = ∛0.151978 = 0.533654
s′ = ∛0.508362 = 0.798101

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.53376
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.13032
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.21371

5. Oklab → OKLCH

C = √(a² + b²) = 0.25031
H = atan2(b, a) = 301.375°
L = 0.53376

6. OKLCH

oklch(0.53376 0.25031 301.375)
rounded: oklch(0.534 0.250 301.4)

All formats

HEX: #8a2be2
RGB: rgb(138 43 226)
RGB (legacy): rgb(138, 43, 226)
HSL: hsl(271.15 75.93% 52.75%) → hsl(271 76% 53%)
HWB: hwb(271 17% 11%)
OKLCH: oklch(0.534 0.250 301.4) · oklch(53.4% 0.250 301.4)
OKLab: oklab(0.534 0.130 -0.214)
Lab (D50): lab(41.21 63.01 -75.96)
LCH (D50): lch(41.21 98.69 309.68)
Display P3: color(display-p3 0.4992 0.1957 0.8535)
Linear sRGB: color(srgb-linear 0.2542 0.0242 0.7605)

Gamut: sRGB and Display P3

#8A2BE2 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.283 and Display P3 reaches 0.295; this color uses 89% of the sRGB chroma available.

CSS snippets

.element {
  color: #8a2be2;
  color: rgb(138 43 226);
  color: hsl(271 76% 53%);
  color: oklch(0.534 0.250 301.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.534 0.250 301.4);
}
/* arbitrary values */
class="text-[#8a2be2] bg-[oklch(0.534_0.250_301.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4992 0.1957 0.8535); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #8a2be2 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

#9C44F7 · oklch(0.594 0.250 301.4) · ΔL +0.06
#7901CD · oklch(0.474 0.250 301.4) · ΔL −0.06

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