#D2203D

CSS

:root {
  --sovereign-red: #d2203d;
  --sovereign-red-rgb: 210 32 61;
  --sovereign-red-oklch: oklch(0.558 0.208 20);
}

.element {
  color: var(--sovereign-red);
  background-color: hsl(350 74% 47%);
  border-color: oklch(0.558 0.208 20);
}

Tailwind CSS v4

@theme {
  --color-sovereign-red: #d2203d;
  --color-sovereign-red-50: #ffdeda;
  --color-sovereign-red-100: #ffcdc9;
  --color-sovereign-red-200: #ffafac;
  --color-sovereign-red-300: #ff8786;
  --color-sovereign-red-400: #ff5f69;
  --color-sovereign-red-500: #f12948;
  --color-sovereign-red-600: #cb273e;
  --color-sovereign-red-700: #a41f31;
  --color-sovereign-red-800: #7a1425;
  --color-sovereign-red-900: #560d19;
  --color-sovereign-red-950: #3a000a;
}

SCSS

$sovereign-red: #d2203d;
$sovereign-red-rgb: 210, 32, 61;
$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);
}