#A36366

CSS

:root {
  --cinnapink: #a36366;
  --cinnapink-rgb: 163 99 102;
  --cinnapink-oklch: oklch(0.571 0.083 17);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(357 26% 51%);
  border-color: oklch(0.571 0.083 17);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a36366;
  --color-cinnapink-50: #ffecec;
  --color-cinnapink-100: #ffdddd;
  --color-cinnapink-200: #f6c7c6;
  --color-cinnapink-300: #dfa7a7;
  --color-cinnapink-400: #cb8b8d;
  --color-cinnapink-500: #b76f72;
  --color-cinnapink-600: #9a5e61;
  --color-cinnapink-700: #7c4b4d;
  --color-cinnapink-800: #5c3639;
  --color-cinnapink-900: #402527;
  --color-cinnapink-950: #291315;
}

SCSS

$cinnapink: #a36366;
$cinnapink-rgb: 163, 99, 102;
$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);
}