Maybe Jacaranda mimosifolia :)

Looks like Veronica spicata/spike veronica. I have one growing at the southeast corner of my house in full sun. It's very well-behaved--remains the same size clump each year but comes up and blooms reliably, seems impervious to either wet or drought conditions. Here is a link that might be useful:

Campanula latiloba is practically identical to C.persicifolia. Main difference in cultivation is that C.persicifolia is subject to rust, and C.latiloba is not.

Wow....maybe I should keep my ideas to myself, but there is too many things going on in that size of bathroom.... I do totally understand the tendency to keep adding things, but you really do not have to put something on every wall. If you look at fine design homes, the less is more concept is the one that is used constantly. The bathroom's basics are quite lovely with the tilework. The colors lend it to a sea/nautical theme quite well, but I don't think the garden addition really belongs. One beautiful nautical painting above the toilet and please lose the purple. Nothing should ever be behind the door when it is opened (it appears the wavy mirrors go behind the door). The tan is an excellent choice (represents sand) in the room. Another color could be a touch of black (to anchor the room). You simply have two themes battling for attention and too many trinkets (corner of tub and back of stool). A few well-chosen and well-placed items in a guest path will get more oohs and ahhs. Just my humble opinion after decorating my home and my friends' homes for over 30 years. The older I get, the less items I use and the better my home looks.