Alex, have you tried [url=https://plants.usda.gov/java/profile?symbol=SIAN3]Sisyrinchium[/url] yet?
I have 'Lucerne' on my native border; a purpler cultivar, true, but I am still representing a [url=https://www.ct-botanical-society.org/galleries/sisyrinchiumangu.html]native of my area[/url]
And yours. And a lovely blue...

As is that Salvia; is it 'Blue Hill'?
I have 'May Night' and 'Caradonna', both far more purple than yours. I had been contemplating tracking down a 'Blue Hill' and you may have tipped me over the edge... I reaally like [url=https://www.finegardening.com/plants/articles/salvia-nemorosa-caradonna.aspx]'Caradonna'[/url] too, if you like purple, real purple this one is a winner...
HG