#CB2F35

CSS

:root {
  --smouldering-red: #cb2f35;
  --smouldering-red-rgb: 203 47 53;
  --smouldering-red-oklch: oklch(0.555 0.192 24.4);
}

.element {
  color: var(--smouldering-red);
  background-color: hsl(358 62% 49%);
  border-color: oklch(0.555 0.192 24.4);
}

Tailwind CSS v4

@theme {
  --color-smouldering-red: #cb2f35;
  --color-smouldering-red-50: #ffe1d8;
  --color-smouldering-red-100: #ffd0c6;
  --color-smouldering-red-200: #ffb4a9;
  --color-smouldering-red-300: #ff8d82;
  --color-smouldering-red-400: #fb6763;
  --color-smouldering-red-500: #ea3b41;
  --color-smouldering-red-600: #c63438;
  --color-smouldering-red-700: #9f2a2c;
  --color-smouldering-red-800: #771c21;
  --color-smouldering-red-900: #541316;
  --color-smouldering-red-950: #380307;
}

SCSS

$smouldering-red: #cb2f35;
$smouldering-red-rgb: 203, 47, 53;
$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);
}