The color of a vacuole in a plant cell can vary depending on the type of plant and the substances stored within the vacuole. Generally, vacuoles are colorless when they are charged with water, but they can appear green, yellow, purple, or red if they contain pigments such as anthocyanins or carotenoids.
In many cases, vacuoles are quite large and may take up a significant portion of the cell, especially in mature plant cells. The pigments stored in these vacuoles contribute to the coloration of fruits and flowers, playing a role in attracting pollinators and aiding in seed dispersal. So, while vacuoles themselves might not have a definitive color, their contents can give rise to vivid hues in various parts of the plant.