#A66163

CSS

:root {
  --cinnapink: #a66163;
  --cinnapink-rgb: 166 97 99;
  --cinnapink-oklch: oklch(0.571 0.09 18.4);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(358 28% 52%);
  border-color: oklch(0.571 0.09 18.4);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #a66163;
  --color-cinnapink-50: #ffecea;
  --color-cinnapink-100: #ffdddb;
  --color-cinnapink-200: #f9c6c4;
  --color-cinnapink-300: #e2a6a4;
  --color-cinnapink-400: #ce898a;
  --color-cinnapink-500: #ba6d6f;
  --color-cinnapink-600: #9d5c5e;
  --color-cinnapink-700: #7e4a4b;
  --color-cinnapink-800: #5e3537;
  --color-cinnapink-900: #422426;
  --color-cinnapink-950: #2a1314;
}

SCSS

$cinnapink: #a66163;
$cinnapink-rgb: 166, 97, 99;
$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);
}