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In this post, the op has used colour to highlight aspects of his question to very good effect.
How is that achieved? I can't seem to find a reference as to how it is done and the menu bar at the head ...
On AskUbuntu there is similar background-formatting for Blockquote text and Preformatted code text.
Example-1 (with preformatted/coded text):
sudo apt-get update
Example-2 (with block-quoted text):