#A08C87

CSS

:root {
  --ruins-of-metal: #a08c87;
  --ruins-of-metal-rgb: 160 140 135;
  --ruins-of-metal-oklch: oklch(0.657 0.025 34.3);
}

.element {
  color: var(--ruins-of-metal);
  background-color: hsl(12 12% 58%);
  border-color: oklch(0.657 0.025 34.3);
}

Tailwind CSS v4

@theme {
  --color-ruins-of-metal: #a08c87;
  --color-ruins-of-metal-50: #fcf3f0;
  --color-ruins-of-metal-100: #f0e5e2;
  --color-ruins-of-metal-200: #dfd1cd;
  --color-ruins-of-metal-300: #c4b3ae;
  --color-ruins-of-metal-400: #ad9995;
  --color-ruins-of-metal-500: #96817b;
  --color-ruins-of-metal-600: #7f6d68;
  --color-ruins-of-metal-700: #665753;
  --color-ruins-of-metal-800: #4b3f3d;
  --color-ruins-of-metal-900: #342c2a;
  --color-ruins-of-metal-950: #1f1917;
}

SCSS

$ruins-of-metal: #a08c87;
$ruins-of-metal-rgb: 160, 140, 135;
$ruins-of-metal-light: mix(#fff, $ruins-of-metal, 20%);
$ruins-of-metal-dark: mix(#000, $ruins-of-metal, 20%);

.element {
  color: $ruins-of-metal;
  box-shadow: 0 0 0 2px rgba($ruins-of-metal, 0.35);
}