Thank you for the topic.
I get requests from Amazon to review my (book) purchases.
When I contacted them about guidance on selecting which buttons (image), they were clueless. I come from Industry where thing are measured to standards.
I wanted a simple guide:
If this, choose A.
A short examples of the different writing perspective.
The whole point of having a 'Standard', is the result has a similar meaning to everyone.
I don't expect everyone to LIKE the book, but 'Dark' should mean the same thing, not being shaded
by locale.