Here are the instructions on how to play Color Sudoku: 1. The game is played on a 9x9 grid, divided into 3x3 subgrids. 2. Instead of numbers, use 9 different colors to fill the grid. Each color should be used once in each row, column, and subgrid. 3. Look at the initial puzzle to see which colors are already filled in the grid. 4. Use logic and deduction skills to fill in the empty spaces with the remaining colors. 5. Each row, column, and subgrid must contain all colors exactly once. 6. Colors should not repeat in any row, column, or subgrid. 7. Some squares may have only one possible color, while others may require a process of elimination. 8. To play, simply click or tap on the square where you want to place the color, and select the color you want to place in that square. 9. Continue filling the grid with colors until you have filled all squares according to the rules of the game.