#8B5942

CSS

:root {
  --weathered-leather: #8b5942;
  --weathered-leather-rgb: 139 89 66;
  --weathered-leather-oklch: oklch(0.514 0.075 45.3);
}

.element {
  color: var(--weathered-leather);
  background-color: hsl(19 36% 40%);
  border-color: oklch(0.514 0.075 45.3);
}

Tailwind CSS v4

@theme {
  --color-weathered-leather: #8b5942;
  --color-weathered-leather-50: #ffefe3;
  --color-weathered-leather-100: #fee1d3;
  --color-weathered-leather-200: #f0cbb9;
  --color-weathered-leather-300: #d9ac97;
  --color-weathered-leather-400: #c4917a;
  --color-weathered-leather-500: #b0765c;
  --color-weathered-leather-600: #95644e;
  --color-weathered-leather-700: #77503e;
  --color-weathered-leather-800: #583a2d;
  --color-weathered-leather-900: #3e281e;
  --color-weathered-leather-950: #27160e;
}

SCSS

$weathered-leather: #8b5942;
$weathered-leather-rgb: 139, 89, 66;
$weathered-leather-light: mix(#fff, $weathered-leather, 20%);
$weathered-leather-dark: mix(#000, $weathered-leather, 20%);

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