American Red

CSS

:root {
  --american-red: #b32134;
  --american-red-rgb: 179 33 52;
  --american-red-oklch: oklch(0.5 0.18 20.6);
}

.element {
  color: var(--american-red);
  background-color: hsl(352 69% 42%);
  border-color: oklch(0.5 0.18 20.6);
}

Tailwind CSS v4

@theme {
  --color-american-red: #b32134;
  --color-american-red-50: #ffe2de;
  --color-american-red-100: #ffd1cc;
  --color-american-red-200: #ffb5b1;
  --color-american-red-300: #ff908c;
  --color-american-red-400: #f66b70;
  --color-american-red-500: #e54350;
  --color-american-red-600: #c13a45;
  --color-american-red-700: #9b2e36;
  --color-american-red-800: #742029;
  --color-american-red-900: #52151b;
  --color-american-red-950: #36050c;
}

SCSS

$american-red: #b32134;
$american-red-rgb: 179, 33, 52;
$american-red-light: mix(#fff, $american-red, 20%);
$american-red-dark: mix(#000, $american-red, 20%);

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