#D02441

CSS

:root {
  --sovereign-red: #d02441;
  --sovereign-red-rgb: 208 36 65;
  --sovereign-red-oklch: oklch(0.557 0.204 19);
}

.element {
  color: var(--sovereign-red);
  background-color: hsl(350 70% 48%);
  border-color: oklch(0.557 0.204 19);
}

Tailwind CSS v4

@theme {
  --color-sovereign-red: #d02441;
  --color-sovereign-red-50: #ffdfdc;
  --color-sovereign-red-100: #ffcdcb;
  --color-sovereign-red-200: #ffb0ae;
  --color-sovereign-red-300: #ff8889;
  --color-sovereign-red-400: #ff606d;
  --color-sovereign-red-500: #ef2e4d;
  --color-sovereign-red-600: #c92a42;
  --color-sovereign-red-700: #a22234;
  --color-sovereign-red-800: #791628;
  --color-sovereign-red-900: #560f1b;
  --color-sovereign-red-950: #39010b;
}

SCSS

$sovereign-red: #d02441;
$sovereign-red-rgb: 208, 36, 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);
}