Yes, all One Day International (ODI) matches are played with a white ball.
This wasn't always the case. Traditionally, cricket balls were red. However, when ODIs started being played at night under floodlights, the red ball proved difficult to see. The white ball was introduced to improve visibility for players and spectators alike.
Even when ODI matches are played during the day, the white ball is still used. This makes it a standard feature of the format.
Therefore, the answer is definitively yes: ODIs utilize a white ball.
