#C14F55

CSS

:root {
  --autumn-fire: #c14f55;
  --autumn-fire-rgb: 193 79 85;
  --autumn-fire-oklch: oklch(0.578 0.147 19.8);
}

.element {
  color: var(--autumn-fire);
  background-color: hsl(357 48% 53%);
  border-color: oklch(0.578 0.147 19.8);
}

Tailwind CSS v4

@theme {
  --color-autumn-fire: #c14f55;
  --color-autumn-fire-50: #ffe5e3;
  --color-autumn-fire-100: #ffd5d2;
  --color-autumn-fire-200: #ffbcb8;
  --color-autumn-fire-300: #f99896;
  --color-autumn-fire-400: #e8787a;
  --color-autumn-fire-500: #d6565d;
  --color-autumn-fire-600: #b4494f;
  --color-autumn-fire-700: #913b3f;
  --color-autumn-fire-800: #6c292f;
  --color-autumn-fire-900: #4c1c20;
  --color-autumn-fire-950: #320b0f;
}

SCSS

$autumn-fire: #c14f55;
$autumn-fire-rgb: 193, 79, 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);
}