#DC3838

CSS

:root {
  --blood-of-my-enemies: #dc3838;
  --blood-of-my-enemies-rgb: 220 56 56;
  --blood-of-my-enemies-oklch: oklch(0.592 0.201 25.8);
}

.element {
  color: var(--blood-of-my-enemies);
  background-color: hsl(0 70% 54%);
  border-color: oklch(0.592 0.201 25.8);
}

Tailwind CSS v4

@theme {
  --color-blood-of-my-enemies: #dc3838;
  --color-blood-of-my-enemies-50: #ffe0d5;
  --color-blood-of-my-enemies-100: #ffcfc3;
  --color-blood-of-my-enemies-200: #ffb2a4;
  --color-blood-of-my-enemies-300: #ff8b7c;
  --color-blood-of-my-enemies-400: #ff645d;
  --color-blood-of-my-enemies-500: #ee3437;
  --color-blood-of-my-enemies-600: #c92f30;
  --color-blood-of-my-enemies-700: #a22626;
  --color-blood-of-my-enemies-800: #79191d;
  --color-blood-of-my-enemies-900: #561013;
  --color-blood-of-my-enemies-950: #390205;
}

SCSS

$blood-of-my-enemies: #dc3838;
$blood-of-my-enemies-rgb: 220, 56, 56;
$blood-of-my-enemies-light: mix(#fff, $blood-of-my-enemies, 20%);
$blood-of-my-enemies-dark: mix(#000, $blood-of-my-enemies, 20%);

.element {
  color: $blood-of-my-enemies;
  box-shadow: 0 0 0 2px rgba($blood-of-my-enemies, 0.35);
}