You start at the bottom right corner of the board. This is your initial point. In each step, you fill a different color in your current area using the buttons at the right. You take over the adjacent cells that are the color you fill. By taking over the cells of different colors in each step you increase your area and try to take over the entire board.
Download Colors for free
Free downloadColors : https://play.google.com/store/apps/details?id=ru.garagelab.colors