Code highlighting
As soon as we want to make it look good, sharing program code on the web requires a bit of consideration for inclusiveness.
My tool of choice for embedding code snippets on websites is:
Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind.
Instead of the default CSS styles, I use the a11y-optimized styles by Eric W. Bailey:
Eric W. Bailey maintains this repository of syntax highlighting styles that consider accessibility (e.g. for prism.js, to present code on websites).