#966B53

CSS

:root {
  --leather: #966b53;
  --leather-rgb: 150 107 83;
  --leather-oklch: oklch(0.566 0.066 50.1);
}

.element {
  color: var(--leather);
  background-color: hsl(21 29% 46%);
  border-color: oklch(0.566 0.066 50.1);
}

Tailwind CSS v4

@theme {
  --color-leather: #966b53;
  --color-leather-50: #fff0e4;
  --color-leather-100: #fbe2d4;
  --color-leather-200: #eccdbb;
  --color-leather-300: #d3af99;
  --color-leather-400: #bf947c;
  --color-leather-500: #aa7a5f;
  --color-leather-600: #906750;
  --color-leather-700: #735240;
  --color-leather-800: #553c2e;
  --color-leather-900: #3c291f;
  --color-leather-950: #25170f;
}

SCSS

$leather: #966b53;
$leather-rgb: 150, 107, 83;
$leather-light: mix(#fff, $leather, 20%);
$leather-dark: mix(#000, $leather, 20%);

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