div boxes in word rendered version are not different

[avahoffman]

Need some way for div boxes to show up as distinct in the word documents.

They look good in the html:

But don't show up in the word doc.

A possible idea is to pursue a word style template - perhaps we can make the custom blocks another color in the template.
https://bookdown.org/yihui/rmarkdown/word-document.html
https://rmarkdown.rstudio.com/articles_docx.html

https://bookdown.org/yihui/rmarkdown-cookbook/custom-blocks.html
https://stackoverflow.com/questions/69865932/getting-bookdown-custom-blocks-to-work-with-pdf-output
https://stackoverflow.com/questions/67803352/bookdown-custom-blocks-in-ms-word-word-document2