Q.What Is A Good Pink Plant For Full Sun In A Large Pot?
using pots in full sun all day.

Certified GKH Gardening Expert
For annuals, you can get pink varieties of lantana, petunia, periwinkle, pentas, verbena, begonia. For perennials, purple coneflower has a long bloom period and so does phlox. Spanish snapdragon also has a long bloom period (most of summer) and is pink/yellow. A pink Knock Out rose would do well in a container as would the other easy care roses. For foliage plants, try a pink Cordyline.
https://www.gardeningknowhow.com/special/containers/full-sun-plants-for-containers.htm
https://www.gardeningknowhow.com/ornamental/flowers/fgen/full-sun-plants.htm