mcovey
.... Why can't there just be a crisp, clean white!
Hahaha, had the same problem as you! The builder said a pure (ie. no tint) white would be an upgrade!
BTW, I happen to have a sample swatch of Dulux "White" colour. It actually says "White W" and there is also "D3" on an opposite corner of the swatch.
I used this sample as a "pure white" when I was judging if a "white" colour is white enough ...