#B0632A

CSS

:root {
  --polished-copper: #b0632a;
  --polished-copper-rgb: 176 99 42;
  --polished-copper-oklch: oklch(0.578 0.122 53.7);
}

.element {
  color: var(--polished-copper);
  background-color: hsl(26 61% 43%);
  border-color: oklch(0.578 0.122 53.7);
}

Tailwind CSS v4

@theme {
  --color-polished-copper: #b0632a;
  --color-polished-copper-50: #ffedd5;
  --color-polished-copper-100: #ffdec2;
  --color-polished-copper-200: #fec7a2;
  --color-polished-copper-300: #e8a77a;
  --color-polished-copper-400: #d68956;
  --color-polished-copper-500: #c36d2c;
  --color-polished-copper-600: #a55c27;
  --color-polished-copper-700: #844a1f;
  --color-polished-copper-800: #633516;
  --color-polished-copper-900: #45240e;
  --color-polished-copper-950: #2d1202;
}

SCSS

$polished-copper: #b0632a;
$polished-copper-rgb: 176, 99, 42;
$polished-copper-light: mix(#fff, $polished-copper, 20%);
$polished-copper-dark: mix(#000, $polished-copper, 20%);

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