#DD2B4E

CSS

:root {
  --cosmic-red: #dd2b4e;
  --cosmic-red-rgb: 221 43 78;
  --cosmic-red-oklch: oklch(0.587 0.21 16.7);
}

.element {
  color: var(--cosmic-red);
  background-color: hsl(348 72% 52%);
  border-color: oklch(0.587 0.21 16.7);
}

Tailwind CSS v4

@theme {
  --color-cosmic-red: #dd2b4e;
  --color-cosmic-red-50: #ffdede;
  --color-cosmic-red-100: #ffcccc;
  --color-cosmic-red-200: #ffaeb1;
  --color-cosmic-red-300: #ff868d;
  --color-cosmic-red-400: #ff5d71;
  --color-cosmic-red-500: #f12552;
  --color-cosmic-red-600: #cb2446;
  --color-cosmic-red-700: #a41d38;
  --color-cosmic-red-800: #7a122a;
  --color-cosmic-red-900: #570c1c;
  --color-cosmic-red-950: #3a000d;
}

SCSS

$cosmic-red: #dd2b4e;
$cosmic-red-rgb: 221, 43, 78;
$cosmic-red-light: mix(#fff, $cosmic-red, 20%);
$cosmic-red-dark: mix(#000, $cosmic-red, 20%);

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