#B16229

CSS

:root {
  --polished-copper: #b16229;
  --polished-copper-rgb: 177 98 41;
  --polished-copper-oklch: oklch(0.577 0.124 52.9);
}

.element {
  color: var(--polished-copper);
  background-color: hsl(25 62% 43%);
  border-color: oklch(0.577 0.124 52.9);
}

Tailwind CSS v4

@theme {
  --color-polished-copper: #b16229;
  --color-polished-copper-50: #ffedd4;
  --color-polished-copper-100: #ffdec1;
  --color-polished-copper-200: #ffc7a2;
  --color-polished-copper-300: #e9a779;
  --color-polished-copper-400: #d78955;
  --color-polished-copper-500: #c46c2b;
  --color-polished-copper-600: #a65b26;
  --color-polished-copper-700: #85491e;
  --color-polished-copper-800: #633415;
  --color-polished-copper-900: #46240e;
  --color-polished-copper-950: #2d1202;
}

SCSS

$polished-copper: #b16229;
$polished-copper-rgb: 177, 98, 41;
$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);
}