why are my tiny purple campanula flowers turning white
I recently bought a tiny purple flower campanula in a container and the flowers are turning light violet and white. I have it indoors where there is a lot of bright light.
Campanula is an outdoor, full sun plant, so it can't thrive indoors. Using a campanula indoors is more like buying an especially long lasting flower bouquet. There's nothing wrong with that. You might like to try putting it outdoors, though - you can put it into a container with a few other plants if you don't have gardening space. Here's more information on these charmers: https://www.gardeningknowhow.com/ornamental/flowers/campanula/growing-campanula-bellflowers.htm
...and here's an article on plants that do flower well indoors: https://www.gardeningknowhow.com/houseplants/hpgen/good-indoor-plants-with-flowers-for-low-light.htm