Thank you for your comments, opinions & suggestions.
Someone asked the size of my blocks. They are 4.5".
It was good to hear that a white ground was important as I had considered other colors.
I will use the comment about a thin gray shadow line below the blue one in a future project.
Above are some possibilities I rejected ... thought you might like seeing them, too.
I will be using the layout with the horizontal strips shown in yesterday's post.
That was the one I thought I would choose because I liked its graphic look.