#CE2B33

CSS

:root {
  --smouldering-red: #ce2b33;
  --smouldering-red-rgb: 206 43 51;
  --smouldering-red-oklch: oklch(0.557 0.198 24.4);
}

.element {
  color: var(--smouldering-red);
  background-color: hsl(357 65% 49%);
  border-color: oklch(0.557 0.198 24.4);
}

Tailwind CSS v4

@theme {
  --color-smouldering-red: #ce2b33;
  --color-smouldering-red-50: #ffe0d7;
  --color-smouldering-red-100: #ffcfc5;
  --color-smouldering-red-200: #ffb2a7;
  --color-smouldering-red-300: #ff8b80;
  --color-smouldering-red-400: #fe6561;
  --color-smouldering-red-500: #ed363e;
  --color-smouldering-red-600: #c83035;
  --color-smouldering-red-700: #a1272a;
  --color-smouldering-red-800: #781a20;
  --color-smouldering-red-900: #551115;
  --color-smouldering-red-950: #390207;
}

SCSS

$smouldering-red: #ce2b33;
$smouldering-red-rgb: 206, 43, 51;
$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);
}