#D41F22

CSS

:root {
  --heroic-red: #d41f22;
  --heroic-red-rgb: 212 31 34;
  --heroic-red-oklch: oklch(0.558 0.212 27.1);
}

.element {
  color: var(--heroic-red);
  background-color: hsl(359 74% 48%);
  border-color: oklch(0.558 0.212 27.1);
}

Tailwind CSS v4

@theme {
  --color-heroic-red: #d41f22;
  --color-heroic-red-50: #ffdfd2;
  --color-heroic-red-100: #ffcdbf;
  --color-heroic-red-200: #ffb09f;
  --color-heroic-red-300: #ff8876;
  --color-heroic-red-400: #ff5f54;
  --color-heroic-red-500: #f3282a;
  --color-heroic-red-600: #cd2626;
  --color-heroic-red-700: #a51f1e;
  --color-heroic-red-800: #7c1318;
  --color-heroic-red-900: #570d0f;
  --color-heroic-red-950: #3b0003;
}

SCSS

$heroic-red: #d41f22;
$heroic-red-rgb: 212, 31, 34;
$heroic-red-light: mix(#fff, $heroic-red, 20%);
$heroic-red-dark: mix(#000, $heroic-red, 20%);

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