In the Red

CSS

:root {
  --in-the-red: #ff2233;
  --in-the-red-rgb: 255 34 51;
  --in-the-red-oklch: oklch(0.64 0.246 25.2);
}

.element {
  color: var(--in-the-red);
  background-color: hsl(355 100% 57%);
  border-color: oklch(0.64 0.246 25.2);
}

Tailwind CSS v4

@theme {
  --color-in-the-red: #ff2233;
  --color-in-the-red-50: #ffdbcf;
  --color-in-the-red-100: #ffc8bb;
  --color-in-the-red-200: #ffa89a;
  --color-in-the-red-300: #ff7c6f;
  --color-in-the-red-400: #ff4b4c;
  --color-in-the-red-500: #ff001b;
  --color-in-the-red-600: #d9001a;
  --color-in-the-red-700: #af0015;
  --color-in-the-red-800: #830013;
  --color-in-the-red-900: #5d000c;
  --color-in-the-red-950: #3f0001;
}

SCSS

$in-the-red: #ff2233;
$in-the-red-rgb: 255, 34, 51;
$in-the-red-light: mix(#fff, $in-the-red, 20%);
$in-the-red-dark: mix(#000, $in-the-red, 20%);

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