True Red

CSS

:root {
  --true-red: #c81a3a;
  --true-red-rgb: 200 26 58;
  --true-red-oklch: oklch(0.536 0.203 19.5);
}

.element {
  color: var(--true-red);
  background-color: hsl(349 77% 44%);
  border-color: oklch(0.536 0.203 19.5);
}

Tailwind CSS v4

@theme {
  --color-true-red: #c81a3a;
  --color-true-red-50: #ffdfdc;
  --color-true-red-100: #ffcdca;
  --color-true-red-200: #ffb0ae;
  --color-true-red-300: #ff8989;
  --color-true-red-400: #ff616c;
  --color-true-red-500: #ee2f4c;
  --color-true-red-600: #c92b41;
  --color-true-red-700: #a22334;
  --color-true-red-800: #791727;
  --color-true-red-900: #560f1a;
  --color-true-red-950: #39010b;
}

SCSS

$true-red: #c81a3a;
$true-red-rgb: 200, 26, 58;
$true-red-light: mix(#fff, $true-red, 20%);
$true-red-dark: mix(#000, $true-red, 20%);

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