#716A6E

CSS

:root {
  --acoustic-brown: #716a6e;
  --acoustic-brown-rgb: 113 106 110;
  --acoustic-brown-oklch: oklch(0.532 0.011 342);
}

.element {
  color: var(--acoustic-brown);
  background-color: hsl(326 3% 43%);
  border-color: oklch(0.532 0.011 342);
}

Tailwind CSS v4

@theme {
  --color-acoustic-brown: #716a6e;
  --color-acoustic-brown-50: #f7f4f6;
  --color-acoustic-brown-100: #ebe6e9;
  --color-acoustic-brown-200: #d8d2d5;
  --color-acoustic-brown-300: #bcb5b9;
  --color-acoustic-brown-400: #a39ca0;
  --color-acoustic-brown-500: #8b8388;
  --color-acoustic-brown-600: #766f73;
  --color-acoustic-brown-700: #5e595c;
  --color-acoustic-brown-800: #454143;
  --color-acoustic-brown-900: #302d2f;
  --color-acoustic-brown-950: #1c1a1b;
}

SCSS

$acoustic-brown: #716a6e;
$acoustic-brown-rgb: 113, 106, 110;
$acoustic-brown-light: mix(#fff, $acoustic-brown, 20%);
$acoustic-brown-dark: mix(#000, $acoustic-brown, 20%);

.element {
  color: $acoustic-brown;
  box-shadow: 0 0 0 2px rgba($acoustic-brown, 0.35);
}