Gilia tricolor - Bird's Eye Gilia

Annual wildflower to 1 ft. Darling blue to purple to white flowers spring into summer. Great for butterflies, bees, and song birds. Full to part sun. Low water, will accept some supplemental water. Tolerates many soil types. Hardy to 10°F. 

Photo Credit: Yasuo Kida 

https://www.flickr.com/photos/kidayasuo/163444907