#B04778

CSS

:root {
  --our-little-secret: #b04778;
  --our-little-secret-rgb: 176 71 120;
  --our-little-secret-oklch: oklch(0.552 0.146 353.9);
}

.element {
  color: var(--our-little-secret);
  background-color: hsl(332 43% 48%);
  border-color: oklch(0.552 0.146 353.9);
}

Tailwind CSS v4

@theme {
  --color-our-little-secret: #b04778;
  --color-our-little-secret-50: #ffe5f6;
  --color-our-little-secret-100: #ffd4e9;
  --color-our-little-secret-200: #ffbad6;
  --color-our-little-secret-300: #f397ba;
  --color-our-little-secret-400: #e077a4;
  --color-our-little-secret-500: #cd568d;
  --color-our-little-secret-600: #ad4a77;
  --color-our-little-secret-700: #8b3b5f;
  --color-our-little-secret-800: #672a48;
  --color-our-little-secret-900: #481c32;
  --color-our-little-secret-950: #2f0c1e;
}

SCSS

$our-little-secret: #b04778;
$our-little-secret-rgb: 176, 71, 120;
$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);
}