#A66370

CSS

:root {
  --cinnapink: #a66370;
  --cinnapink-rgb: 166 99 112;
  --cinnapink-oklch: oklch(0.578 0.088 7.6);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(348 27% 52%);
  border-color: oklch(0.578 0.088 7.6);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a66370;
  --color-cinnapink-50: #ffebef;
  --color-cinnapink-100: #ffdce1;
  --color-cinnapink-200: #f7c5cc;
  --color-cinnapink-300: #e0a5ad;
  --color-cinnapink-400: #cc8995;
  --color-cinnapink-500: #b86d7b;
  --color-cinnapink-600: #9b5c68;
  --color-cinnapink-700: #7d4a53;
  --color-cinnapink-800: #5c353e;
  --color-cinnapink-900: #41242b;
  --color-cinnapink-950: #291318;
}

SCSS

$cinnapink: #a66370;
$cinnapink-rgb: 166, 99, 112;
$cinnapink-light: mix(#fff, $cinnapink, 20%);
$cinnapink-dark: mix(#000, $cinnapink, 20%);

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