BEES
Bees, on the other hand, are colour blind to red & zero in on the blue side of the spectrum: earlier in the year, lilacs & ceanothus & early campanulas.
In full summer, buddleia is always swarming with bees as are subshrubs such as rosemary, lavender, sage & thyme. Perennials such as veronica, delphinium & hardy geraniums are good bee plants, as are the scented verbena, agastache and anchusa.
Bees don't shun plants just because they aren't blue: both monarda (bee balm) and asclepias (butterfly weed) can & do attract lots of bees, as does eryngium (sea holly) and many annuals & biennials: cleome, cornflowers, snapdragons & foxglove are good examples.