#CC2E34

CSS

:root {
  --smouldering-red: #cc2e34;
  --smouldering-red-rgb: 204 46 52;
  --smouldering-red-oklch: oklch(0.555 0.194 24.6);
}

.element {
  color: var(--smouldering-red);
  background-color: hsl(358 63% 49%);
  border-color: oklch(0.555 0.194 24.6);
}

Tailwind CSS v4

@theme {
  --color-smouldering-red: #cc2e34;
  --color-smouldering-red-50: #ffe1d8;
  --color-smouldering-red-100: #ffcfc6;
  --color-smouldering-red-200: #ffb3a8;
  --color-smouldering-red-300: #ff8d81;
  --color-smouldering-red-400: #fc6662;
  --color-smouldering-red-500: #eb393f;
  --color-smouldering-red-600: #c63336;
  --color-smouldering-red-700: #a0292b;
  --color-smouldering-red-800: #771b21;
  --color-smouldering-red-900: #541216;
  --color-smouldering-red-950: #380307;
}

SCSS

$smouldering-red: #cc2e34;
$smouldering-red-rgb: 204, 46, 52;
$smouldering-red-light: mix(#fff, $smouldering-red, 20%);
$smouldering-red-dark: mix(#000, $smouldering-red, 20%);

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