RGB to HEX: #A1A1A1

Result

Values are shown at full precision, so converting back gives exactly #a1a1a1. 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. base 10 → base 16

   R = 161 = 10×16 + 1 → A1
   G = 161 = 10×16 + 1 → A1
   B = 161 = 10×16 + 1 → A1

2. 2. pairs → HEX

   A1 A1 A1 → #A1A1A1

All formats

HEX

#a1a1a1

RGB

rgb(161 161 161)

RGB (legacy)

rgb(161, 161, 161)

HSL

hsl(0.00 0.00% 63.14%) → hsl(0 0% 63%)

HWB

hwb(0 63% 37%)

OKLCH

oklch(0.709 0.000 0.0) · oklch(70.9% 0.000 0.0)

OKLab

oklab(0.709 0.000 0.000)

Lab (D50)

lab(66.24 0.00 0.00)

LCH (D50)

lch(66.24 0.00 0.00)

Display P3

color(display-p3 0.6314 0.6314 0.6314)

Linear sRGB

color(srgb-linear 0.3564 0.3564 0.3564)

Gamut: sRGB and Display P3

#A1A1A1 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.201 and Display P3 reaches 0.259; this color uses 0% of the sRGB chroma available.

CSS snippets

.element {
  color: #a1a1a1;
  color: rgb(161 161 161);
  color: hsl(0 0% 63%);
  color: oklch(0.709 0.000 0.0);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.709 0.000 0.0);
}
/* arbitrary values */
class="text-[#a1a1a1] bg-[oklch(0.709_0.000_0.0)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6314 0.6314 0.6314); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #a1a1a1 calc(l - 0.1) c h); }

Nearby colors

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

• v3 neutral-400#A3A3A3
• stone-400#A6A09B
• v3 stone-400#A8A29E
• v3 zinc-400#A1A1AA
• zinc-400#9F9FA9
• taupe-400#ABA09C
• mauve-400#A89EA9
• v3 gray-400#9CA3AF

Lighter and darker, same hue and chroma

• #B4B4B4 · oklch(0.769 0.000 0.0) · ΔL +0.06
• #8F8F8F · oklch(0.649 0.000 0.0) · ΔL −0.06

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