#E41B34

CSS

:root {
  --red-handed: #e41b34;
  --red-handed-rgb: 228 27 52;
  --red-handed-oklch: oklch(0.588 0.226 23.3);
}

.element {
  color: var(--red-handed);
  background-color: hsl(353 79% 50%);
  border-color: oklch(0.588 0.226 23.3);
}

Tailwind CSS v4

@theme {
  --color-red-handed: #e41b34;
  --color-red-handed-50: #ffddd4;
  --color-red-handed-100: #ffcac1;
  --color-red-handed-200: #ffaca2;
  --color-red-handed-300: #ff827a;
  --color-red-handed-400: #ff565a;
  --color-red-handed-500: #f90534;
  --color-red-handed-600: #d2122d;
  --color-red-handed-700: #a91124;
  --color-red-handed-800: #7e081c;
  --color-red-handed-900: #5a0612;
  --color-red-handed-950: #3c0005;
}

SCSS

$red-handed: #e41b34;
$red-handed-rgb: 228, 27, 52;
$red-handed-light: mix(#fff, $red-handed, 20%);
$red-handed-dark: mix(#000, $red-handed, 20%);

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