#A45173

CSS

:root {
  --our-little-secret: #a45173;
  --our-little-secret-rgb: 164 81 115;
  --our-little-secret-oklch: oklch(0.547 0.116 355.8);
}

.element {
  color: var(--our-little-secret);
  background-color: hsl(335 34% 48%);
  border-color: oklch(0.547 0.116 355.8);
}

Tailwind CSS v4

@theme {
  --color-our-little-secret: #a45173;
  --color-our-little-secret-50: #ffe8f5;
  --color-our-little-secret-100: #ffd9e8;
  --color-our-little-secret-200: #fec0d4;
  --color-our-little-secret-300: #e89fb7;
  --color-our-little-secret-400: #d481a1;
  --color-our-little-secret-500: #c16389;
  --color-our-little-secret-600: #a35474;
  --color-our-little-secret-700: #83435d;
  --color-our-little-secret-800: #613045;
  --color-our-little-secret-900: #442130;
  --color-our-little-secret-950: #2c101c;
}

SCSS

$our-little-secret: #a45173;
$our-little-secret-rgb: 164, 81, 115;
$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);
}