#706B6C

CSS

:root {
  --acoustic-brown: #706b6c;
  --acoustic-brown-rgb: 112 107 108;
  --acoustic-brown-oklch: oklch(0.533 0.006 3.5);
}

.element {
  color: var(--acoustic-brown);
  background-color: hsl(348 2% 43%);
  border-color: oklch(0.533 0.006 3.5);
}

Tailwind CSS v4

@theme {
  --color-acoustic-brown: #706b6c;
  --color-acoustic-brown-50: #f7f4f5;
  --color-acoustic-brown-100: #eae7e7;
  --color-acoustic-brown-200: #d7d3d4;
  --color-acoustic-brown-300: #bab6b7;
  --color-acoustic-brown-400: #a29d9e;
  --color-acoustic-brown-500: #8a8486;
  --color-acoustic-brown-600: #757071;
  --color-acoustic-brown-700: #5d5a5a;
  --color-acoustic-brown-800: #444142;
  --color-acoustic-brown-900: #2f2d2e;
  --color-acoustic-brown-950: #1c1a1a;
}

SCSS

$acoustic-brown: #706b6c;
$acoustic-brown-rgb: 112, 107, 108;
$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);
}