I recently did an altered book layout that described the properties of 11 different colors. I needed a variety of backgrounds that were monochrome, simple, and fun. Here are the pages when they were finished:
Here’s a speed-through video, showing how those backgrounds went together. They’re all pretty simple:
https://youtu.be/uQFvxgNSrXc
Wow! Thanks so much for sharing the creativity. Love the rainbow theme!!