Blue may be a universally beloved color for interiors, but it encompasses a vast number of different hues and tones, and that ...
One to consider is Blue False Indigo. The first couple of years after planting Blue False Indigo, you won't see many flowers. It develops a deep root system that helps with drought tolerance.
For some unknown reason, I have never grown the perennial Baptisia, aka false indigo plants. I plan on correcting that this ...