#BC5722

CSS

:root {
  --titian-red: #bc5722;
  --titian-red-rgb: 188 87 34;
  --titian-red-oklch: oklch(0.575 0.145 44.9);
}

.element {
  color: var(--titian-red);
  background-color: hsl(21 69% 44%);
  border-color: oklch(0.575 0.145 44.9);
}

Tailwind CSS v4

@theme {
  --color-titian-red: #bc5722;
  --color-titian-red-50: #ffe9d2;
  --color-titian-red-100: #ffdabf;
  --color-titian-red-200: #ffc29f;
  --color-titian-red-300: #f4a076;
  --color-titian-red-400: #e48051;
  --color-titian-red-500: #d16023;
  --color-titian-red-600: #b15220;
  --color-titian-red-700: #8e411a;
  --color-titian-red-800: #6a2e13;
  --color-titian-red-900: #4b1f0c;
  --color-titian-red-950: #310e01;
}

SCSS

$titian-red: #bc5722;
$titian-red-rgb: 188, 87, 34;
$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);
}