Color in this photo isn't exact, but close.
Common name: Rose of Sharon 'Blue Bird'
This looks more like 'Red Heart' or maybe 'Helene'. I know you said that the color isn't exact, but this looks quite white in comparison to a 'Blue Bird'
Slokare, you are right about the whiteness of the photo. It scanned almost pure white. That is a problem with scanning photos.
In person, the color is much more purple than blue, especially when not grown in full, warm sun.
I will attempt to scan a photo again, and try to manipulate the color to be more accurate.