#EE000F

CSS

:root {
  --breath-of-fire: #ee000f;
  --breath-of-fire-rgb: 238 0 15;
  --breath-of-fire-oklch: oklch(0.596 0.244 28.2);
}

.element {
  color: var(--breath-of-fire);
  background-color: hsl(356 100% 47%);
  border-color: oklch(0.596 0.244 28.2);
}

Tailwind CSS v4

@theme {
  --color-breath-of-fire: #ee000f;
  --color-breath-of-fire-50: #ffdbcc;
  --color-breath-of-fire-100: #ffc9b7;
  --color-breath-of-fire-200: #ffaa94;
  --color-breath-of-fire-300: #ff7e67;
  --color-breath-of-fire-400: #ff4e42;
  --color-breath-of-fire-500: #ff0000;
  --color-breath-of-fire-600: #d80002;
  --color-breath-of-fire-700: #ae0004;
  --color-breath-of-fire-800: #830009;
  --color-breath-of-fire-900: #5d0006;
  --color-breath-of-fire-950: #3e0000;
}

SCSS

$breath-of-fire: #ee000f;
$breath-of-fire-rgb: 238, 0, 15;
$breath-of-fire-light: mix(#fff, $breath-of-fire, 20%);
$breath-of-fire-dark: mix(#000, $breath-of-fire, 20%);

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