#C4551E

CSS

:root {
  --titian-red: #c4551e;
  --titian-red-rgb: 196 85 30;
  --titian-red-oklch: oklch(0.584 0.156 43.2);
}

.element {
  color: var(--titian-red);
  background-color: hsl(20 73% 44%);
  border-color: oklch(0.584 0.156 43.2);
}

Tailwind CSS v4

@theme {
  --color-titian-red: #c4551e;
  --color-titian-red-50: #ffe8d1;
  --color-titian-red-100: #ffd8bd;
  --color-titian-red-200: #ffbf9c;
  --color-titian-red-300: #f99d72;
  --color-titian-red-400: #e97c4d;
  --color-titian-red-500: #d75a1a;
  --color-titian-red-600: #b54d19;
  --color-titian-red-700: #923e14;
  --color-titian-red-800: #6d2b10;
  --color-titian-red-900: #4d1d0a;
  --color-titian-red-950: #330c00;
}

SCSS

$titian-red: #c4551e;
$titian-red-rgb: 196, 85, 30;
$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);
}