#C24E55

CSS

:root {
  --autumn-fire: #c24e55;
  --autumn-fire-rgb: 194 78 85;
  --autumn-fire-oklch: oklch(0.578 0.149 19.4);
}

.element {
  color: var(--autumn-fire);
  background-color: hsl(356 49% 53%);
  border-color: oklch(0.578 0.149 19.4);
}

Tailwind CSS v4

@theme {
  --color-autumn-fire: #c24e55;
  --color-autumn-fire-50: #ffe5e2;
  --color-autumn-fire-100: #ffd5d2;
  --color-autumn-fire-200: #ffbbb8;
  --color-autumn-fire-300: #fa9896;
  --color-autumn-fire-400: #e9777a;
  --color-autumn-fire-500: #d7545d;
  --color-autumn-fire-600: #b5484f;
  --color-autumn-fire-700: #923a3f;
  --color-autumn-fire-800: #6d292f;
  --color-autumn-fire-900: #4c1b20;
  --color-autumn-fire-950: #320b0f;
}

SCSS

$autumn-fire: #c24e55;
$autumn-fire-rgb: 194, 78, 85;
$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);
}