#AD497B

CSS

:root {
  --our-little-secret: #ad497b;
  --our-little-secret-rgb: 173 73 123;
  --our-little-secret-oklch: oklch(0.551 0.142 351.6);
}

.element {
  color: var(--our-little-secret);
  background-color: hsl(330 41% 48%);
  border-color: oklch(0.551 0.142 351.6);
}

Tailwind CSS v4

@theme {
  --color-our-little-secret: #ad497b;
  --color-our-little-secret-50: #ffe5f8;
  --color-our-little-secret-100: #ffd5eb;
  --color-our-little-secret-200: #ffbbd9;
  --color-our-little-secret-300: #f098bd;
  --color-our-little-secret-400: #dd79a8;
  --color-our-little-secret-500: #c95891;
  --color-our-little-secret-600: #aa4c7a;
  --color-our-little-secret-700: #893c62;
  --color-our-little-secret-800: #652b4a;
  --color-our-little-secret-900: #471d33;
  --color-our-little-secret-950: #2e0d1f;
}

SCSS

$our-little-secret: #ad497b;
$our-little-secret-rgb: 173, 73, 123;
$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);
}