Thank you Dennis.
I am posting this because the mat cutting class might be interested.
I was not very happy with the cream/white mat - it seemed too cold - so I went back and the framers redid the mat. They were very good and only charged me $20 extra. My camera is not quite picking up the colours in the first framed pic or in this one. There is a deep inside mat in a denim blue which lifts the painting almost two mat thicknesses, then the outer mat is a grey/mauve colour - like some cloud colour and the frame is blue and a kind of distressed blue/silver.
Dennis, I was surprised to find the framers had glued all the layers together
My buyer seemed to be happy with the result - though I thought afterwards it would have been useful to know the decor of the room it was going into.