This is Rowan Kidsilk Haze Vintage in shade #005, Smalt. KSH Vintage was one of Rowan's Selects yarns and is now discontinued.
Smalt is a beautiful blue shade.
It is the same blend of silk and kid mohair as regular Kidsilk Haze but the white core of the yarn shows through giving it a melange effect.
There are free designs here
on the Rowan website.
Please click on the thumbnails to enlarge the views