#B5494B

CSS

:root {
  --intrigue-red: #b5494b;
  --intrigue-red-rgb: 181 73 75;
  --intrigue-red-oklch: oklch(0.549 0.141 21.8);
}

.element {
  color: var(--intrigue-red);
  background-color: hsl(359 43% 50%);
  border-color: oklch(0.549 0.141 21.8);
}

Tailwind CSS v4

@theme {
  --color-intrigue-red: #b5494b;
  --color-intrigue-red-50: #ffe6e2;
  --color-intrigue-red-100: #ffd6d1;
  --color-intrigue-red-200: #ffbdb7;
  --color-intrigue-red-300: #f79a94;
  --color-intrigue-red-400: #e67a79;
  --color-intrigue-red-500: #d3595b;
  --color-intrigue-red-600: #b24c4d;
  --color-intrigue-red-700: #8f3d3d;
  --color-intrigue-red-800: #6b2b2e;
  --color-intrigue-red-900: #4b1d1f;
  --color-intrigue-red-950: #310c0f;
}

SCSS

$intrigue-red: #b5494b;
$intrigue-red-rgb: 181, 73, 75;
$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);
}