#8C6351

CSS

:root {
  --weathered-leather: #8c6351;
  --weathered-leather-rgb: 140 99 81;
  --weathered-leather-oklch: oklch(0.538 0.06 44.6);
}

.element {
  color: var(--weathered-leather);
  background-color: hsl(18 27% 43%);
  border-color: oklch(0.538 0.06 44.6);
}

Tailwind CSS v4

@theme {
  --color-weathered-leather: #8c6351;
  --color-weathered-leather-50: #fff0e7;
  --color-weathered-leather-100: #fae2d7;
  --color-weathered-leather-200: #ebcdbf;
  --color-weathered-leather-300: #d2af9e;
  --color-weathered-leather-400: #be9481;
  --color-weathered-leather-500: #a87a65;
  --color-weathered-leather-600: #8e6756;
  --color-weathered-leather-700: #725244;
  --color-weathered-leather-800: #553c32;
  --color-weathered-leather-900: #3b2922;
  --color-weathered-leather-950: #251711;
}

SCSS

$weathered-leather: #8c6351;
$weathered-leather-rgb: 140, 99, 81;
$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);
}