That is a nice blue color. I think the best way to create a garden is to find the most beautiful local plants and plant them around the house.
The worst way to do a garden is to import plants as the plants might escape the garden and become in invasive.
Wikipedia has an article on the Asiatic DayFlower which has the scientific name Commelina communis.
RE: Find Asiatic Dayflower and bring it home as ornamental plant