I took to using these Post-it page markers
to help me organize my day planner into different projects. You'll notice there are 10 different colors. I've actually stopped using the page markers themselves, but I've adopted the palette for a project spreadsheet I'm using and also bought markers in these colors. I'm wondering why Post-it chose these particular colors (two greens, one blue, two purples, two pinks, etc.) for their product. What's the thinking behind it?