Flintstone Blue

CSS

:root {
  --flintstone-blue: #434252;
  --flintstone-blue-rgb: 67 66 82;
  --flintstone-blue-oklch: oklch(0.386 0.027 287.9);
}

.element {
  color: var(--flintstone-blue);
  background-color: hsl(244 11% 29%);
  border-color: oklch(0.386 0.027 287.9);
}

Tailwind CSS v4

@theme {
  --color-flintstone-blue: #434252;
  --color-flintstone-blue-50: #f5f4fd;
  --color-flintstone-blue-100: #e7e6f1;
  --color-flintstone-blue-200: #d4d3df;
  --color-flintstone-blue-300: #b7b5c5;
  --color-flintstone-blue-400: #9d9cae;
  --color-flintstone-blue-500: #858498;
  --color-flintstone-blue-600: #706f80;
  --color-flintstone-blue-700: #5a5967;
  --color-flintstone-blue-800: #41414c;
  --color-flintstone-blue-900: #2d2d34;
  --color-flintstone-blue-950: #1a1a20;
}

SCSS

$flintstone-blue: #434252;
$flintstone-blue-rgb: 67, 66, 82;
$flintstone-blue-light: mix(#fff, $flintstone-blue, 20%);
$flintstone-blue-dark: mix(#000, $flintstone-blue, 20%);

.element {
  color: $flintstone-blue;
  box-shadow: 0 0 0 2px rgba($flintstone-blue, 0.35);
}