HEX to OKLCH: #71717B

Result

Values are shown at full precision, so converting back gives exactly #71717b. 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. sRGB → linear

   R: 113/255 = 0.44314 → 0.165132  (((x + 0.055) / 1.055)^2.4)
   G: 113/255 = 0.44314 → 0.165132  (((x + 0.055) / 1.055)^2.4)
   B: 123/255 = 0.48235 → 0.198069  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.166827
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.168670
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.185882

3. 3. cube root

   l′ = ∛0.166827 = 0.550497
   m′ = ∛0.168670 = 0.552517
   s′ = ∛0.185882 = 0.570706

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.55202
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.00420
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.01476

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.01535
   H = atan2(b, a) = 285.886°
   L = 0.55202

6. 6. OKLCH

   oklch(0.55202 0.01535 285.886)
   rounded: oklch(0.552 0.015 285.9)

All formats

HEX

#71717b

RGB

rgb(113 113 123)

RGB (legacy)

rgb(113, 113, 123)

HSL

hsl(240.00 4.24% 46.27%) → hsl(240 4% 46%)

HWB

hwb(240 44% 52%)

OKLCH

oklch(0.552 0.015 285.9) · oklch(55.2% 0.015 285.9)

OKLab

oklab(0.552 0.004 -0.015)

Lab (D50)

lab(47.90 1.58 -5.54)

LCH (D50)

lch(47.90 5.76 285.90)

Display P3

color(display-p3 0.4431 0.4431 0.4790)

Linear sRGB

color(srgb-linear 0.1651 0.1651 0.1981)

Gamut: sRGB and Display P3

#71717B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.261 and Display P3 reaches 0.280; this color uses 6% of the sRGB chroma available.

CSS snippets

.element {
  color: #71717b;
  color: rgb(113 113 123);
  color: hsl(240 4% 46%);
  color: oklch(0.552 0.015 285.9);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.552 0.015 285.9);
}
/* arbitrary values */
class="text-[#71717b] bg-[oklch(0.552_0.015_285.9)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4431 0.4431 0.4790); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #71717b calc(l - 0.1) c h); }

Nearby colors

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

• v3 zinc-500#71717A
• v3 gray-500#6B7280
• gray-500#6A7282
• neutral-500#737373
• mist-500#67787C
• v3 stone-500#78716C
• mauve-500#79697B
• stone-500#79716B

Lighter and darker, same hue and chroma

• #83838D · oklch(0.612 0.015 285.9) · ΔL +0.06
• #60606A · oklch(0.492 0.015 285.9) · ΔL −0.06

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