#C2534F

CSS

:root {
  --autumn-fire: #c2534f;
  --autumn-fire-rgb: 194 83 79;
  --autumn-fire-oklch: oklch(0.584 0.144 24.6);
}

.element {
  color: var(--autumn-fire);
  background-color: hsl(2 49% 54%);
  border-color: oklch(0.584 0.144 24.6);
}

Tailwind CSS v4

@theme {
  --color-autumn-fire: #c2534f;
  --color-autumn-fire-50: #ffe6df;
  --color-autumn-fire-100: #ffd6cf;
  --color-autumn-fire-200: #ffbdb4;
  --color-autumn-fire-300: #f89a90;
  --color-autumn-fire-400: #e77a73;
  --color-autumn-fire-500: #d55854;
  --color-autumn-fire-600: #b34c48;
  --color-autumn-fire-700: #903c39;
  --color-autumn-fire-800: #6c2a2a;
  --color-autumn-fire-900: #4c1d1c;
  --color-autumn-fire-950: #320c0d;
}

SCSS

$autumn-fire: #c2534f;
$autumn-fire-rgb: 194, 83, 79;
$autumn-fire-light: mix(#fff, $autumn-fire, 20%);
$autumn-fire-dark: mix(#000, $autumn-fire, 20%);

.element {
  color: $autumn-fire;
  box-shadow: 0 0 0 2px rgba($autumn-fire, 0.35);
}