#B5484D

CSS

:root {
  --intrigue-red: #b5484d;
  --intrigue-red-rgb: 181 72 77;
  --intrigue-red-oklch: oklch(0.549 0.142 20.3);
}

.element {
  color: var(--intrigue-red);
  background-color: hsl(357 43% 50%);
  border-color: oklch(0.549 0.142 20.3);
}

Tailwind CSS v4

@theme {
  --color-intrigue-red: #b5484d;
  --color-intrigue-red-50: #ffe6e3;
  --color-intrigue-red-100: #ffd6d2;
  --color-intrigue-red-200: #ffbdb9;
  --color-intrigue-red-300: #f89a96;
  --color-intrigue-red-400: #e6797b;
  --color-intrigue-red-500: #d3585d;
  --color-intrigue-red-600: #b34b4f;
  --color-intrigue-red-700: #903c3f;
  --color-intrigue-red-800: #6b2a2f;
  --color-intrigue-red-900: #4b1d20;
  --color-intrigue-red-950: #310c0f;
}

SCSS

$intrigue-red: #b5484d;
$intrigue-red-rgb: 181, 72, 77;
$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);
}