Author of tricolore here, the library used for color coding this map. This page shows how to create maps like this yourself: github.com/jschoeley/tr.... Here's an example for the whole of Europe. Happy for a citation to www.demographic-research.org/volumes/vol4... if you use this coding.

I think the trick is to have an informative midpoint (e.g. an average). If done well, the color scheme can read just as well as a linear divergent scale, i.e. it gives information about how much deviation from the mean (lightness, chroma), and in which class direction (hue).

Is the problem worse with certain submission types? You will know that Arxiv CS just started to refuse review and position papers. blog.arxiv.org/2025/10/31/a...

I was also worried that the obvious "I don't know what you don't know" would shorten my stay.

I started talking about the surprisingly large probability of loosing a child in the year following fetal viability. "It's all nutrition", I was informed, "I raise cattle". This was the second time someone brought up cattle upon hearing about my research. I should start to listen.