OK I am not sure if this is right, but my DH is French and I remember visiting his grandmother's country house with beautiful wisteria (purple flowers). I think they call it glycine (not sure of spelling either). That would make sense for it to be purple color.
Hey You! Reminded me of "Hey, now, Hey, now. Don't dream it's over" songOh that would be really pretty, maybe a soft purple !!!!! ^ hey you!