#AF602A

CSS

:root {
  --polished-copper: #af602a;
  --polished-copper-rgb: 175 96 42;
  --polished-copper-oklch: oklch(0.571 0.122 51.8);
}

.element {
  color: var(--polished-copper);
  background-color: hsl(24 61% 43%);
  border-color: oklch(0.571 0.122 51.8);
}

Tailwind CSS v4

@theme {
  --color-polished-copper: #af602a;
  --color-polished-copper-50: #ffedd5;
  --color-polished-copper-100: #ffdec2;
  --color-polished-copper-200: #ffc7a3;
  --color-polished-copper-300: #e9a67b;
  --color-polished-copper-400: #d78957;
  --color-polished-copper-500: #c46b2e;
  --color-polished-copper-600: #a65b29;
  --color-polished-copper-700: #854920;
  --color-polished-copper-800: #633417;
  --color-polished-copper-900: #46230f;
  --color-polished-copper-950: #2d1203;
}

SCSS

$polished-copper: #af602a;
$polished-copper-rgb: 175, 96, 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);
}