#AD4E54

CSS

:root {
  --intrigue-red: #ad4e54;
  --intrigue-red-rgb: 173 78 84;
  --intrigue-red-oklch: oklch(0.546 0.125 18.3);
}

.element {
  color: var(--intrigue-red);
  background-color: hsl(356 38% 49%);
  border-color: oklch(0.546 0.125 18.3);
}

Tailwind CSS v4

@theme {
  --color-intrigue-red: #ad4e54;
  --color-intrigue-red-50: #ffe8e6;
  --color-intrigue-red-100: #ffd8d7;
  --color-intrigue-red-200: #ffc0be;
  --color-intrigue-red-300: #f19e9d;
  --color-intrigue-red-400: #de7f82;
  --color-intrigue-red-500: #cb5f66;
  --color-intrigue-red-600: #ac5157;
  --color-intrigue-red-700: #8a4145;
  --color-intrigue-red-800: #662e33;
  --color-intrigue-red-900: #481f23;
  --color-intrigue-red-950: #2f0f12;
}

SCSS

$intrigue-red: #ad4e54;
$intrigue-red-rgb: 173, 78, 84;
$intrigue-red-light: mix(#fff, $intrigue-red, 20%);
$intrigue-red-dark: mix(#000, $intrigue-red, 20%);

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