While there isn't a single official "Colorku Puzzle Cards PDF" for free download, you can create your own printable puzzle cards using a standard Sudoku-to-Color conversion system. Colorku is simply Sudoku played with colors. 1. Standard Color Conversion Key
The Obsession
Creating your own ColorKu puzzle cards is a great way to extend the life of the game or replace lost originals. Since ColorKu is essentially Sudoku played with colors instead of numbers, you can easily develop a custom guide or printable PDF using standard Sudoku grids and a color-key system. 1. Basic Setup & Rules colorku puzzle cards pdf