Depending on where your vases will be located, it is illogical to make them a bright red color that stands out from the rest of the panorama. The ideal colors would be cream, pink, gray, and white, which blend in with most gardens and give a calming impression. These colors complement the greenery of the plants without taking away from their shape or shade. If you want to create contrast with bright colors, you can choose darker colors such as anthracite or navy blue, which will immediately add an element of class to the garden. It should also be remembered that dark-colored pots can heat up in the sun and therefore affect the warmth of the soil inside the pot, so they are suitable for plants that cannot tolerate extreme heat. If you are interested in extra large pots I have recently found some interesting options. They have different colors for large pots and you can choose the one that best suits your garden and plants.