#EE0013

CSS

:root {
  --breath-of-fire: #ee0013;
  --breath-of-fire-rgb: 238 0 19;
  --breath-of-fire-oklch: oklch(0.597 0.244 27.9);
}

.element {
  color: var(--breath-of-fire);
  background-color: hsl(355 100% 47%);
  border-color: oklch(0.597 0.244 27.9);
}

Tailwind CSS v4

@theme {
  --color-breath-of-fire: #ee0013;
  --color-breath-of-fire-50: #ffdbcc;
  --color-breath-of-fire-100: #ffc9b8;
  --color-breath-of-fire-200: #ffaa95;
  --color-breath-of-fire-300: #ff7e69;
  --color-breath-of-fire-400: #ff4e43;
  --color-breath-of-fire-500: #ff0000;
  --color-breath-of-fire-600: #d80006;
  --color-breath-of-fire-700: #ae0007;
  --color-breath-of-fire-800: #82000b;
  --color-breath-of-fire-900: #5c0007;
  --color-breath-of-fire-950: #3e0000;
}

SCSS

$breath-of-fire: #ee0013;
$breath-of-fire-rgb: 238, 0, 19;
$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);
}