A new and distinct variety of blueberry plant named ‘DrisBlueFifteen’ particularly distinguished by producing later fruit having skin without bloom on immature fruit that is greyed-purple in color, skin without bloom on mature fruit that is dark blue in color, and skin with bloom on mature fruit that is light violet-blue in color, post-harvest fruit that can be stored for two weeks without a significant deterioration in quality, and having a plant with an average height of 138.4 cm, an average width of 185.5 cm, and a semi-erect growth habit, is disclosed.