#B45289

CSS

:root {
  --our-little-secret: #b45289;
  --our-little-secret-rgb: 180 82 137;
  --our-little-secret-oklch: oklch(0.578 0.142 347.6);
}

.element {
  color: var(--our-little-secret);
  background-color: hsl(326 40% 51%);
  border-color: oklch(0.578 0.142 347.6);
}

Tailwind CSS v4

@theme {
  --color-our-little-secret: #b45289;
  --color-our-little-secret-50: #ffe5fb;
  --color-our-little-secret-100: #ffd5ef;
  --color-our-little-secret-200: #ffbcdd;
  --color-our-little-secret-300: #ee99c2;
  --color-our-little-secret-400: #da79ae;
  --color-our-little-secret-500: #c75997;
  --color-our-little-secret-600: #a84c80;
  --color-our-little-secret-700: #873d66;
  --color-our-little-secret-800: #642b4d;
  --color-our-little-secret-900: #461d35;
  --color-our-little-secret-950: #2d0d21;
}

SCSS

$our-little-secret: #b45289;
$our-little-secret-rgb: 180, 82, 137;
$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);
}