#AE6428

CSS

:root {
  --polished-copper: #ae6428;
  --polished-copper-rgb: 174 100 40;
  --polished-copper-oklch: oklch(0.577 0.12 55.9);
}

.element {
  color: var(--polished-copper);
  background-color: hsl(27 63% 42%);
  border-color: oklch(0.577 0.12 55.9);
}

Tailwind CSS v4

@theme {
  --color-polished-copper: #ae6428;
  --color-polished-copper-50: #ffeed4;
  --color-polished-copper-100: #ffdfc1;
  --color-polished-copper-200: #fcc8a2;
  --color-polished-copper-300: #e6a879;
  --color-polished-copper-400: #d48b55;
  --color-polished-copper-500: #c16e2a;
  --color-polished-copper-600: #a35e25;
  --color-polished-copper-700: #834b1e;
  --color-polished-copper-800: #623515;
  --color-polished-copper-900: #45240d;
  --color-polished-copper-950: #2c1302;
}

SCSS

$polished-copper: #ae6428;
$polished-copper-rgb: 174, 100, 40;
$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);
}