#C05415

CSS

:root {
  --titian-red: #c05415;
  --titian-red-rgb: 192 84 21;
  --titian-red-oklch: oklch(0.576 0.155 45.2);
}

.element {
  color: var(--titian-red);
  background-color: hsl(22 80% 42%);
  border-color: oklch(0.576 0.155 45.2);
}

Tailwind CSS v4

@theme {
  --color-titian-red: #c05415;
  --color-titian-red-50: #ffe9d0;
  --color-titian-red-100: #ffd9bc;
  --color-titian-red-200: #ffc09b;
  --color-titian-red-300: #f89e70;
  --color-titian-red-400: #e87d4a;
  --color-titian-red-500: #d55c12;
  --color-titian-red-600: #b44f14;
  --color-titian-red-700: #913f11;
  --color-titian-red-800: #6c2c0d;
  --color-titian-red-900: #4c1e08;
  --color-titian-red-950: #320d00;
}

SCSS

$titian-red: #c05415;
$titian-red-rgb: 192, 84, 21;
$titian-red-light: mix(#fff, $titian-red, 20%);
$titian-red-dark: mix(#000, $titian-red, 20%);

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