bit Generations is a video game franchise for the Game Boy Advance, published by Nintendo. Each of the games in the series feature simple controls, gameplay and graphics. All the games were developed by Skip Ltd., except for Digidrive, which was developed by Q-Games. The bit Generations series has only been released in Japan.

Coloris sees players eliminating colored squares by altering the color of other squares to make them the same color as the squares nearby.
The game features two different game modes: clear mode and score mode. In clear mode the player must eliminate a certain number of squares (depending on the difficulty level) before moving on to the next level. In score mode the player must eliminate squares to achieve a high score.