#A66467

CSS

:root {
  --cinnapink: #a66467;
  --cinnapink-rgb: 166 100 103;
  --cinnapink-oklch: oklch(0.577 0.086 17.1);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(357 27% 52%);
  border-color: oklch(0.577 0.086 17.1);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a66467;
  --color-cinnapink-50: #ffeceb;
  --color-cinnapink-100: #ffdddd;
  --color-cinnapink-200: #f7c6c6;
  --color-cinnapink-300: #e0a6a6;
  --color-cinnapink-400: #cc8a8c;
  --color-cinnapink-500: #b86e71;
  --color-cinnapink-600: #9b5d60;
  --color-cinnapink-700: #7d4b4d;
  --color-cinnapink-800: #5c3639;
  --color-cinnapink-900: #412527;
  --color-cinnapink-950: #291315;
}

SCSS

$cinnapink: #a66467;
$cinnapink-rgb: 166, 100, 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);
}