#8B6353

CSS

:root {
  --weathered-leather: #8b6353;
  --weathered-leather-rgb: 139 99 83;
  --weathered-leather-oklch: oklch(0.537 0.058 42.7);
}

.element {
  color: var(--weathered-leather);
  background-color: hsl(17 25% 44%);
  border-color: oklch(0.537 0.058 42.7);
}

Tailwind CSS v4

@theme {
  --color-weathered-leather: #8b6353;
  --color-weathered-leather-50: #fff0e8;
  --color-weathered-leather-100: #fae2d8;
  --color-weathered-leather-200: #ebcdc0;
  --color-weathered-leather-300: #d2afa0;
  --color-weathered-leather-400: #bd9484;
  --color-weathered-leather-500: #a87a68;
  --color-weathered-leather-600: #8e6758;
  --color-weathered-leather-700: #725346;
  --color-weathered-leather-800: #543c33;
  --color-weathered-leather-900: #3b2923;
  --color-weathered-leather-950: #251712;
}

SCSS

$weathered-leather: #8b6353;
$weathered-leather-rgb: 139, 99, 83;
$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);
}