HSL to HEX: #101828

Also known as: Tailwind gray-900

hsl(220.00 42.86% 10.98%) → #101828

Values are shown at full precision, so converting back gives exactly #101828. 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 = 220.00°, S = 42.86%, L = 10.98%
```
2. C
```
C = (1 − |2L − 1|) × S = 0.09412
```

3. X

X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.03137   (H / 60° = 3.6667, sector 3)

4. m
```
m = L − C / 2 = 0.06274
```

5. (R′, G′, B′) + m

(R′, G′, B′) = (0.00000, 0.03137, 0.09412)
R = round((0.00000 + 0.06274) × 255) = 16
G = round((0.03137 + 0.06274) × 255) = 24
B = round((0.09412 + 0.06274) × 255) = 40

6. RGB → HEX
```
#101828
```

All formats

HEX: #101828
RGB: rgb(16 24 40)
RGB (legacy): rgb(16, 24, 40)
HSL: hsl(220.00 42.86% 10.98%) → hsl(220 43% 11%)
HWB: hwb(220 6% 84%)
OKLCH: oklch(0.210 0.034 263.4) · oklch(21.0% 0.034 263.4)
OKLab: oklab(0.210 -0.004 -0.034)
Lab (D50): lab(8.12 0.58 -12.27)
LCH (D50): lch(8.12 12.29 272.73)
Display P3: color(display-p3 0.0691 0.0932 0.1520)
Linear sRGB: color(srgb-linear 0.0052 0.0091 0.0212)

Gamut: sRGB and Display P3

#101828 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.111 and Display P3 reaches 0.135; this color uses 31% of the sRGB chroma available.

CSS snippets

.element {
  color: #101828;
  color: rgb(16 24 40);
  color: hsl(220 43% 11%);
  color: oklch(0.210 0.034 263.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.210 0.034 263.4);
}
/* arbitrary values */
class="text-[#101828] bg-[oklch(0.210_0.034_263.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0691 0.0932 0.1520); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #101828 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

#1E2637 · oklch(0.270 0.034 263.4) · ΔL +0.06
#050B19 · oklch(0.150 0.034 263.4) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

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Guides: What is OKLCH?