Compared to ``lightbulb`` theme we used in the past for the dark theme, the
``monokai`` has a better contrast [1].
BTW, the result list of SearXNG should not act as a code-checker: The border &
color of class ``.err`` (used for syntax errors) has been removed / code
snippets are often not well formed nor valid code and the rendering of such code
fragments as errors obscures the view on the code snippet.
[1] https://pygments.org/styles/
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>