#AC4C70

CSS

:root {
  --our-little-secret: #ac4c70;
  --our-little-secret-rgb: 172 76 112;
  --our-little-secret-oklch: oklch(0.55 0.131 358.8);
}

.element {
  color: var(--our-little-secret);
  background-color: hsl(338 39% 49%);
  border-color: oklch(0.55 0.131 358.8);
}

Tailwind CSS v4

@theme {
  --color-our-little-secret: #ac4c70;
  --color-our-little-secret-50: #ffe6f3;
  --color-our-little-secret-100: #ffd6e5;
  --color-our-little-secret-200: #ffbdd1;
  --color-our-little-secret-300: #ef9bb4;
  --color-our-little-secret-400: #dc7c9d;
  --color-our-little-secret-500: #c95c84;
  --color-our-little-secret-600: #aa4f70;
  --color-our-little-secret-700: #883f5a;
  --color-our-little-secret-800: #652d43;
  --color-our-little-secret-900: #471e2e;
  --color-our-little-secret-950: #2e0e1b;
}

SCSS

$our-little-secret: #ac4c70;
$our-little-secret-rgb: 172, 76, 112;
$our-little-secret-light: mix(#fff, $our-little-secret, 20%);
$our-little-secret-dark: mix(#000, $our-little-secret, 20%);

.element {
  color: $our-little-secret;
  box-shadow: 0 0 0 2px rgba($our-little-secret, 0.35);
}