You can see how Pure White looks in our bonus room, which is a north-facing room. A north-facing room is where you will see Pure White look the closest to a true white because of how the natural light hits it.
In South-facing rooms, there tends to be a consistently bright light throughout the day. Pure White by Sherwin Williams is most likely going to show its warmth in a south-facing room. That is certainly true of my home office, which is south facing.
Our kitchen is an interior room that gets indirect light from the south. The fact that it gets little natural light makes the high light-reflective value of Sherwin Williams Pure White really important in this space, especially against the dark cabinets that I painted myself.