OKLCH to HEX: #4169E1

Also known as: CSS royalblue

oklch(0.55985 0.18823 266.400) → #4169E1

Values are shown at full precision, so converting back gives exactly #4169e1. 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. input
```
oklch(0.55985 0.18823 266.400)
```

2. OKLCH → Oklab

a = C·cos H = -0.01182
b = C·sin H = -0.18786

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.514625
m′ = L − 0.1056·a − 0.0639·b = 0.573093
s′ = L − 0.0895·a − 1.2915·b = 0.803524

4. cube

l = 0.514625³ = 0.136293
m = 0.573093³ = 0.188224
s = 0.803524³ = 0.518796

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.052865
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.141266
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.752932

6. linear → sRGB, × 255

R = 0.25491 × 255 = 65.00 → 65
G = 0.41177 × 255 = 105.00 → 105
B = 0.88235 × 255 = 225.00 → 225

7. RGB → HEX
```
#4169E1
```

All formats

HEX: #4169e1
RGB: rgb(65 105 225)
RGB (legacy): rgb(65, 105, 225)
HSL: hsl(225.00 72.73% 56.86%) → hsl(225 73% 57%)
HWB: hwb(225 25% 12%)
OKLCH: oklch(0.560 0.188 266.4) · oklch(56.0% 0.188 266.4)
OKLab: oklab(0.560 -0.012 -0.188)
Lab (D50): lab(46.80 17.78 -66.66)
LCH (D50): lch(46.80 68.99 284.94)
Display P3: color(display-p3 0.2904 0.4077 0.8525)
Linear sRGB: color(srgb-linear 0.0529 0.1413 0.7529)

Gamut: sRGB and Display P3

#4169E1 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.242 and Display P3 reaches 0.259; this color uses 78% of the sRGB chroma available.

CSS snippets

.element {
  color: #4169e1;
  color: rgb(65 105 225);
  color: hsl(225 73% 57%);
  color: oklch(0.560 0.188 266.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.560 0.188 266.4);
}
/* arbitrary values */
class="text-[#4169e1] bg-[oklch(0.560_0.188_266.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2904 0.4077 0.8525); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #4169e1 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

#517CF6 · oklch(0.620 0.188 266.4) · ΔL +0.06
#3156CC · oklch(0.500 0.188 266.4) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

All converters →

Guides: What is OKLCH?