where we make babies matters

I just saw this on happy mundane and it's similar to the idea I have for my master bedroom wall. And all the photos would be of Mike and I from dating to present time. A photo journal, if you will, of our developing love and life together over the years. It would be easy to add to it over the ongoing years and make the rectangle--> square shape expand by adding to either side.
The photo is from Better Homes and Gardens (UK). I think the background wall could use a matte finish in blue or some other calming color, but that's just me. The white wall + white in the photos + white in the framing around the photo doesn't seem to match up right. Could anyone ever really get that much white coordinated perfectly?