#996677

CSS

:root {
  --cinnapink: #996677;
  --cinnapink-rgb: 153 102 119;
  --cinnapink-oklch: oklch(0.569 0.069 357.9);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(340 20% 50%);
  border-color: oklch(0.569 0.069 357.9);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #996677;
  --color-cinnapink-50: #ffedf4;
  --color-cinnapink-100: #fddfe7;
  --color-cinnapink-200: #efc9d3;
  --color-cinnapink-300: #d6a9b6;
  --color-cinnapink-400: #c18e9e;
  --color-cinnapink-500: #ac7386;
  --color-cinnapink-600: #916171;
  --color-cinnapink-700: #754e5b;
  --color-cinnapink-800: #563843;
  --color-cinnapink-900: #3c272e;
  --color-cinnapink-950: #26151b;
}

SCSS

$cinnapink: #996677;
$cinnapink-rgb: 153, 102, 119;
$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);
}