Thanks okh for you reply.

I'm using Sweet Home 3D for creating fairly simple floor layouts, which I use in my software package for creating Building Management Systems. I have set the background colour to black and it comes out the darkish grey colour. Ideally it would be good to match the background colour which is light grey. I guess I'll need to play around with the settings?

Thanks.

PS - I would have posted an image in the reply, but I didn't know how to.