#AE642A

CSS

:root {
  --polished-copper: #ae642a;
  --polished-copper-rgb: 174 100 42;
  --polished-copper-oklch: oklch(0.577 0.119 55.2);
}

.element {
  color: var(--polished-copper);
  background-color: hsl(26 61% 42%);
  border-color: oklch(0.577 0.119 55.2);
}

Tailwind CSS v4

@theme {
  --color-polished-copper: #ae642a;
  --color-polished-copper-50: #ffedd5;
  --color-polished-copper-100: #ffdfc2;
  --color-polished-copper-200: #fcc8a3;
  --color-polished-copper-300: #e6a87a;
  --color-polished-copper-400: #d48b56;
  --color-polished-copper-500: #c16e2c;
  --color-polished-copper-600: #a35d27;
  --color-polished-copper-700: #834b1f;
  --color-polished-copper-800: #623516;
  --color-polished-copper-900: #45240e;
  --color-polished-copper-950: #2c1302;
}

SCSS

$polished-copper: #ae642a;
$polished-copper-rgb: 174, 100, 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);
}