#8D562A

CSS

:root {
  --precious-copper: #8d562a;
  --precious-copper-rgb: 141 86 42;
  --precious-copper-oklch: oklch(0.507 0.094 57);
}

.element {
  color: var(--precious-copper);
  background-color: hsl(27 54% 36%);
  border-color: oklch(0.507 0.094 57);
}

Tailwind CSS v4

@theme {
  --color-precious-copper: #8d562a;
  --color-precious-copper-50: #ffefdb;
  --color-precious-copper-100: #ffe1ca;
  --color-precious-copper-200: #f3cbad;
  --color-precious-copper-300: #dcac87;
  --color-precious-copper-400: #c99067;
  --color-precious-copper-500: #b57544;
  --color-precious-copper-600: #99633b;
  --color-precious-copper-700: #7b4f2e;
  --color-precious-copper-800: #5b3921;
  --color-precious-copper-900: #402716;
  --color-precious-copper-950: #291507;
}

SCSS

$precious-copper: #8d562a;
$precious-copper-rgb: 141, 86, 42;
$precious-copper-light: mix(#fff, $precious-copper, 20%);
$precious-copper-dark: mix(#000, $precious-copper, 20%);

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