#CD2B41

CSS

:root {
  --sovereign-red: #cd2b41;
  --sovereign-red-rgb: 205 43 65;
  --sovereign-red-oklch: oklch(0.557 0.196 19.8);
}

.element {
  color: var(--sovereign-red);
  background-color: hsl(352 65% 49%);
  border-color: oklch(0.557 0.196 19.8);
}

Tailwind CSS v4

@theme {
  --color-sovereign-red: #cd2b41;
  --color-sovereign-red-50: #ffe0dc;
  --color-sovereign-red-100: #ffcecb;
  --color-sovereign-red-200: #ffb2af;
  --color-sovereign-red-300: #ff8b8a;
  --color-sovereign-red-400: #fd646d;
  --color-sovereign-red-500: #eb354d;
  --color-sovereign-red-600: #c73042;
  --color-sovereign-red-700: #a02634;
  --color-sovereign-red-800: #771a28;
  --color-sovereign-red-900: #54111b;
  --color-sovereign-red-950: #38020b;
}

SCSS

$sovereign-red: #cd2b41;
$sovereign-red-rgb: 205, 43, 65;
$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);
}