I have a hard time with the white color ranges. They all seem to be the same and yet so different. I also find it hard to match existing white paint in my home. Have you ever taken a paint swatch home, liked it so you paint the room, and then it is a totally different color than the swatch. I have found a web site that really helped me in choosing the right color. Try this site out and see if it helps you.

Here is a link that might be useful: Paint color cheat sheets

Atrium white can look pink.