After selecting the paint colour it was worth the investment in a 900ml sample mix to see what it looks like on the walls in the house the paint was selected for.
The sample container gives enough paint to coat part of a wall twice and see what it really looks like when it dries. For some reason, this one doesn't look how I thought it was going to based on the chip. It may be worth selecting something else.
Usually it helps to put three paints on the wall and have the flooring and tile samples close by to highlight contrast among the samples.
At least all the paints I chose were better than the primer.
And sampling paint is an excellent chance to bring in some helpers to roll some paint on the walls
Finally someone is interested in a job at the construction site.
After all this I decided my original paint was not working like I had expected. I preferred the lighter shade. The final selection now is SW750 'Egret White', rather than SW761 'On the rocks'. This is yet another reason not to select finishes from computer screens and catalogues.