#A66169

CSS

:root {
  --cinnapink: #a66169;
  --cinnapink-rgb: 166 97 105;
  --cinnapink-oklch: oklch(0.572 0.09 12.8);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(353 28% 52%);
  border-color: oklch(0.572 0.09 12.8);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a66169;
  --color-cinnapink-50: #ffebed;
  --color-cinnapink-100: #ffdcde;
  --color-cinnapink-200: #f8c5c8;
  --color-cinnapink-300: #e2a5a9;
  --color-cinnapink-400: #ce888f;
  --color-cinnapink-500: #ba6c75;
  --color-cinnapink-600: #9d5c63;
  --color-cinnapink-700: #7e494f;
  --color-cinnapink-800: #5d353b;
  --color-cinnapink-900: #412428;
  --color-cinnapink-950: #2a1316;
}

SCSS

$cinnapink: #a66169;
$cinnapink-rgb: 166, 97, 105;
$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);
}