#A56167

CSS

:root {
  --cinnapink: #a56167;
  --cinnapink-rgb: 165 97 103;
  --cinnapink-oklch: oklch(0.571 0.089 14.6);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(355 27% 51%);
  border-color: oklch(0.571 0.089 14.6);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a56167;
  --color-cinnapink-50: #ffecec;
  --color-cinnapink-100: #ffdddd;
  --color-cinnapink-200: #f8c6c7;
  --color-cinnapink-300: #e1a5a7;
  --color-cinnapink-400: #cd898e;
  --color-cinnapink-500: #b96d74;
  --color-cinnapink-600: #9c5c62;
  --color-cinnapink-700: #7e4a4e;
  --color-cinnapink-800: #5d353a;
  --color-cinnapink-900: #412428;
  --color-cinnapink-950: #2a1316;
}

SCSS

$cinnapink: #a56167;
$cinnapink-rgb: 165, 97, 103;
$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);
}