#A36364

CSS

:root {
  --cinnapink: #a36364;
  --cinnapink-rgb: 163 99 100;
  --cinnapink-oklch: oklch(0.571 0.083 19);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(359 26% 51%);
  border-color: oklch(0.571 0.083 19);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a36364;
  --color-cinnapink-50: #ffeceb;
  --color-cinnapink-100: #ffdedc;
  --color-cinnapink-200: #f6c7c5;
  --color-cinnapink-300: #dfa7a5;
  --color-cinnapink-400: #cb8b8b;
  --color-cinnapink-500: #b76f70;
  --color-cinnapink-600: #9a5e5f;
  --color-cinnapink-700: #7c4b4c;
  --color-cinnapink-800: #5c3638;
  --color-cinnapink-900: #402526;
  --color-cinnapink-950: #291315;
}

SCSS

$cinnapink: #a36364;
$cinnapink-rgb: 163, 99, 100;
$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);
}