HEX to HSL: #1D293D

Result

Values are shown at full precision, so converting back gives exactly #1d293d. 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. 1. RGB ÷ 255

   R = 0.1137
   G = 0.1608
   B = 0.2392

2. 2. max, min, Δ

   max = 0.2392
   min = 0.1137
   Δ = max − min = 0.1255

3. 3. L

   L = (max + min) / 2 = 0.1765 = 17.65%

4. 4. S

   S = Δ / (1 − |2L − 1|) = 0.3556 = 35.56%

5. 5. H

   max is B → H = 60° × ((R − G) / Δ + 4) = 60° × ((0.1137 − 0.1608) / 0.1255 + 4) = 217.50°

6. 6. HSL

   hsl(217.50 35.56% 17.65%)

All formats

HEX

#1d293d

RGB

rgb(29 41 61)

RGB (legacy)

rgb(29, 41, 61)

HSL

hsl(217.50 35.56% 17.65%) → hsl(218 36% 18%)

HWB

hwb(218 11% 76%)

OKLCH

oklch(0.280 0.041 260.3) · oklch(28.0% 0.041 260.3)

OKLab

oklab(0.280 -0.007 -0.040)

Lab (D50)

lab(16.23 -0.26 -14.60)

LCH (D50)

lch(16.23 14.60 268.96)

Display P3

color(display-p3 0.1234 0.1594 0.2329)

Linear sRGB

color(srgb-linear 0.0123 0.0222 0.0467)

Gamut: sRGB and Display P3

#1D293D is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.116 and Display P3 reaches 0.146; this color uses 35% of the sRGB chroma available.

CSS snippets

.element {
  color: #1d293d;
  color: rgb(29 41 61);
  color: hsl(218 36% 18%);
  color: oklch(0.280 0.041 260.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.280 0.041 260.3);
}
/* arbitrary values */
class="text-[#1d293d] bg-[oklch(0.280_0.041_260.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1234 0.1594 0.2329); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #1d293d calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• v3 slate-800#1E293B
• gray-800#1E2939
• v3 gray-800#1F2937
• v3 sky-950#082F49
• sky-950#052F4A
• mist-800#22292B
• v3 cyan-950#083344
• zinc-800#27272A

Lighter and darker, same hue and chroma

• #2C384D · oklch(0.340 0.041 260.3) · ΔL +0.06
• #0F1A2D · oklch(0.220 0.041 260.3) · ΔL −0.06

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