OKLCH to HEX: #A9A9A9

Result

Values are shown at full precision, so converting back gives exactly #a9a9a9. 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. input

   oklch(0.73481 0.00000 0.000)

2. 2. OKLCH → Oklab

   a = C·cos H = 0.00000
   b = C·sin H = 0.00000

3. 3. Oklab → LMS′

   l′ = L + 0.3963·a + 0.2158·b = 0.734810
   m′ = L − 0.1056·a − 0.0639·b = 0.734810
   s′ = L − 0.0895·a − 1.2915·b = 0.734810

4. 4. cube

   l = 0.734810³ = 0.396758
   m = 0.734810³ = 0.396758
   s = 0.734810³ = 0.396758

5. 5. LMS → linear sRGB

   R = 4.0767·l − 3.3077·m + 0.2310·s = 0.396758
   G = −1.2684·l + 2.6098·m − 0.3413·s = 0.396758
   B = −0.0042·l − 0.7034·m + 1.7076·s = 0.396758

6. 6. linear → sRGB, × 255

   R = 0.66275 × 255 = 169.00 → 169
   G = 0.66275 × 255 = 169.00 → 169
   B = 0.66275 × 255 = 169.00 → 169

7. 7. RGB → HEX

   #A9A9A9

All formats

HEX

#a9a9a9

RGB

rgb(169 169 169)

RGB (legacy)

rgb(169, 169, 169)

HSL

hsl(0.00 0.00% 66.27%) → hsl(0 0% 66%)

HWB

hwb(0 66% 34%)

OKLCH

oklch(0.735 0.000 0.0) · oklch(73.5% 0.000 0.0)

OKLab

oklab(0.735 0.000 0.000)

Lab (D50)

lab(69.24 0.00 0.00)

LCH (D50)

lch(69.24 0.00 0.00)

Display P3

color(display-p3 0.6627 0.6627 0.6627)

Linear sRGB

color(srgb-linear 0.3968 0.3968 0.3968)

Gamut: sRGB and Display P3

#A9A9A9 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.178 and Display P3 reaches 0.230; this color uses 0% of the sRGB chroma available.

CSS snippets

.element {
  color: #a9a9a9;
  color: rgb(169 169 169);
  color: hsl(0 0% 66%);
  color: oklch(0.735 0.000 0.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.735 0.000 0.0);
}
/* arbitrary values */
class="text-[#a9a9a9] bg-[oklch(0.735_0.000_0.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6627 0.6627 0.6627); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a9a9a9 calc(l - 0.1) c h); }

Nearby colors

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

• mist-400#9CA8AB
• v3 neutral-400#A3A3A3
• v3 stone-400#A8A29E
• olive-400#ABAB9C
• taupe-400#ABA09C
• neutral-400#A1A1A1
• v3 zinc-400#A1A1AA
• stone-400#A6A09B

Lighter and darker, same hue and chroma

• #BCBCBC · oklch(0.795 0.000 0.0) · ΔL +0.06
• #979797 · oklch(0.675 0.000 0.0) · ΔL −0.06

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