HSL to HEX: #4169E1

Also known as: CSS royalblue

hsl(225.00 72.73% 56.86%) → #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
```
H = 225.00°, S = 72.73%, L = 56.86%
```
2. C
```
C = (1 − |2L − 1|) × S = 0.62751
```

3. X

X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.15688   (H / 60° = 3.7500, sector 3)

4. m
```
m = L − C / 2 = 0.25484
```

5. (R′, G′, B′) + m

(R′, G′, B′) = (0.00000, 0.15688, 0.62751)
R = round((0.00000 + 0.25484) × 255) = 65
G = round((0.15688 + 0.25484) × 255) = 105
B = round((0.62751 + 0.25484) × 255) = 225

6. 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?