#C93243

CSS

:root {
  --sovereign-red: #c93243;
  --sovereign-red-rgb: 201 50 67;
  --sovereign-red-oklch: oklch(0.556 0.186 20);
}

.element {
  color: var(--sovereign-red);
  background-color: hsl(353 60% 49%);
  border-color: oklch(0.556 0.186 20);
}

Tailwind CSS v4

@theme {
  --color-sovereign-red: #c93243;
  --color-sovereign-red-50: #ffe1dd;
  --color-sovereign-red-100: #ffd0cc;
  --color-sovereign-red-200: #ffb4b0;
  --color-sovereign-red-300: #ff8e8c;
  --color-sovereign-red-400: #f9686f;
  --color-sovereign-red-500: #e73d50;
  --color-sovereign-red-600: #c33644;
  --color-sovereign-red-700: #9d2b36;
  --color-sovereign-red-800: #751d29;
  --color-sovereign-red-900: #53141b;
  --color-sovereign-red-950: #37040c;
}

SCSS

$sovereign-red: #c93243;
$sovereign-red-rgb: 201, 50, 67;
$sovereign-red-light: mix(#fff, $sovereign-red, 20%);
$sovereign-red-dark: mix(#000, $sovereign-red, 20%);

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