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Stack Overflow: dark code blocks

Gives code blocks and inline snippets a dark background with light text, easing eye strain on the light page.

Code to copy

/* Dark theme just for the code blocks */
.s-prose pre,
.js-post-body pre {
  background: #1e1e1e !important;
  color: #d4d4d4 !important;
  border: 1px solid #333 !important;
}
.s-prose code,
.js-post-body code {
  background: #2a2a2a !important;
  color: #e6e6e6 !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.