#AD4F4F

CSS

:root {
  --intrigue-red: #ad4f4f;
  --intrigue-red-rgb: 173 79 79;
  --intrigue-red-oklch: oklch(0.547 0.124 22);
}

.element {
  color: var(--intrigue-red);
  background-color: hsl(0 37% 49%);
  border-color: oklch(0.547 0.124 22);
}

Tailwind CSS v4

@theme {
  --color-intrigue-red: #ad4f4f;
  --color-intrigue-red-50: #ffe8e4;
  --color-intrigue-red-100: #ffd9d4;
  --color-intrigue-red-200: #ffc0bb;
  --color-intrigue-red-300: #f09e99;
  --color-intrigue-red-400: #de7f7d;
  --color-intrigue-red-500: #cb6060;
  --color-intrigue-red-600: #ac5252;
  --color-intrigue-red-700: #8a4241;
  --color-intrigue-red-800: #662f30;
  --color-intrigue-red-900: #482021;
  --color-intrigue-red-950: #2f0f10;
}

SCSS

$intrigue-red: #ad4f4f;
$intrigue-red-rgb: 173, 79, 79;
$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);
}