Quoted paragraphs render somewhat too prominently in our new document theme

[jfbu]

Describe the bug

On my display I see this

on visiting https://www.sphinx-doc.org/en/master/usage/configuration.html

How to Reproduce

Visit https://www.sphinx-doc.org/en/master/usage/configuration.html

with master at least at 94024e6ef

Expected behavior

No response

Your project

www.sphinx-doc.org

Screenshots

No response

OS

Mac

Python version

3.10.4

Sphinx version

master at 94024e6ef

Sphinx extensions

No response

Extra tools

No response

Additional context

linking here to the recent improvements #10677, #10659, #10652