Bill, caryopteris.....I have sterling silver with silver grey foliage,summer sorbet with yellow foliage and others. All with Blue flowers about to appear. Ceratostigma wilmottianum. Teuchrium, dwarf form. Anchusa. Dwarf hebes. Aster frikartii monch, not a shrub, but lavendar blue flowers for weeks. There are some lovely forms of rosemary with rich dark blue flowers, I have one. I grow salvia cacalifolia a tender bright blue perennial too so there are loads. Jolly bee can be cut back hard mid summer to bloom again. I also grow a geranium with purple leaves and bright blue flowers the name of which escapes me for moment. Jolly bee is a tough hardy perennial by the way