C64 Blue

CSS

:root {
  --c64-blue: #003aff;
  --c64-blue-rgb: 0 58 255;
  --c64-blue-oklch: oklch(0.493 0.286 264);
}

.element {
  color: var(--c64-blue);
  background-color: hsl(226 100% 50%);
  border-color: oklch(0.493 0.286 264);
}

Tailwind CSS v4

@theme {
  --color-c64-blue: #003aff;
  --color-c64-blue-50: #cff4ff;
  --color-c64-blue-100: #bbe5ff;
  --color-c64-blue-200: #9bceff;
  --color-c64-blue-300: #72acff;
  --color-c64-blue-400: #428cff;
  --color-c64-blue-500: #1864ff;
  --color-c64-blue-600: #1656ff;
  --color-c64-blue-700: #1145d8;
  --color-c64-blue-800: #0033a2;
  --color-c64-blue-900: #002373;
  --color-c64-blue-950: #000f51;
}

SCSS

$c64-blue: #003aff;
$c64-blue-rgb: 0, 58, 255;
$c64-blue-light: mix(#fff, $c64-blue, 20%);
$c64-blue-dark: mix(#000, $c64-blue, 20%);

.element {
  color: $c64-blue;
  box-shadow: 0 0 0 2px rgba($c64-blue, 0.35);
}