HEX to OKLCH: #6B7280

Result

Values are shown at full precision, so converting back gives exactly #6b7280. 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: 107/255 = 0.41961 → 0.147027  (((x + 0.055) / 1.055)^2.4)
   G: 114/255 = 0.44706 → 0.168269  (((x + 0.055) / 1.055)^2.4)
   B: 128/255 = 0.50196 → 0.215861  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.161961
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.168879
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.196375

3. 3. cube root

   l′ = ∛0.161961 = 0.545093
   m′ = ∛0.168879 = 0.552746
   s′ = ∛0.196375 = 0.581249

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.55102
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.00229
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.02325

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.02336
   H = atan2(b, a) = 264.364°
   L = 0.55102

6. 6. OKLCH

   oklch(0.55102 0.02336 264.364)
   rounded: oklch(0.551 0.023 264.4)

All formats

HEX

#6b7280

RGB

rgb(107 114 128)

RGB (legacy)

rgb(107, 114, 128)

HSL

hsl(220.00 8.94% 46.08%) → hsl(220 9% 46%)

HWB

hwb(220 42% 50%)

OKLCH

oklch(0.551 0.023 264.4) · oklch(55.1% 0.023 264.4)

OKLab

oklab(0.551 -0.002 -0.023)

Lab (D50)

lab(47.81 -0.39 -8.70)

LCH (D50)

lch(47.81 8.71 267.45)

Display P3

color(display-p3 0.4246 0.4462 0.4970)

Linear sRGB

color(srgb-linear 0.1470 0.1683 0.2159)

Gamut: sRGB and Display P3

#6B7280 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.248 and Display P3 reaches 0.265; this color uses 9% of the sRGB chroma available.

CSS snippets

.element {
  color: #6b7280;
  color: rgb(107 114 128);
  color: hsl(220 9% 46%);
  color: oklch(0.551 0.023 264.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.551 0.023 264.4);
}
/* arbitrary values */
class="text-[#6b7280] bg-[oklch(0.551_0.023_264.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4246 0.4462 0.4970); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #6b7280 calc(l - 0.1) c h); }

Nearby colors

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

• gray-500#6A7282
• zinc-500#71717B
• v3 zinc-500#71717A
• v3 slate-500#64748B
• mist-500#67787C
• slate-500#62748E
• neutral-500#737373
• mauve-500#79697B

Lighter and darker, same hue and chroma

• #7C8492 · oklch(0.611 0.023 264.4) · ΔL +0.06
• #5A616E · oklch(0.491 0.023 264.4) · ΔL −0.06

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