I have customized the colors of my Discourse instance to use a dark background color, however syntax highlighting does not look good anymore. What is the easiest way to tell highlight.js to use a different style?

Unfortunately it looks like it isn’t working correctly. I copy/pasted the CSS from the Agate theme to a new section in Admin / Customize / CSS: [image] However I get the following results: [image] (Link to the page: https://forum.appleseedhq.net/t/some-thoughts-on-beta-1-4/144 ) Notice that t…

Looks like I would need to add !important to each CSS property… Is anyone aware of a better solution? Edit: it doesn’t look like the !important solution would even work…

Nope, it’s because the default has a higher specificity - .hljs-tag .hljs-string . You need to replicate the theme’s rule with that selector.

Thanks @riking , I hadn’t seen this. Unfortunately that means it’s basically impossible to try highlight.js themes (from their demo page ) to find one that fits the color palette of my Discourse instance without inspecting and tweaking them, one rule at a time… So I guess my original question remain…

Just bumping this in case anyone else has found a nice way of importing nicer and more colourful styles for syntax highlighting of code? Something that looks more like a modern code editor’s view. Custom CSS would be an acceptable solution, wondered if anyone has either put suitable CSS in a CDN fo…

I agree it is pretty fiddly overriding what we have. Highlight ships with a big pile of themes at: [image] highlight.js/src/styles at main · highlightjs/highlight.js JavaScript syntax highlighter with language auto-detection and zero dependencies. - highlightjs/highlight.js …

I made a theme component that allows admins to select a hljs theme from a dropdown. More details here [image] Codeblock Theme Picker Theme component discourse2 Summary Codeblock Theme Picker will allow you to easily change the theme used in code blocks. …

Change highlight.js styles?

Support

Johani (Joe) Avril 1, 2020, 6:53 11

J’ai créé un composant de thème qui permet aux administrateurs de sélectionner un thème hljs dans une liste déroulante. Plus de détails ici

Sujet		Réponses	Vues
Choosing code highlight styles Support	3	1278	Avril 18, 2016
(old) method for adding languages to highlight.js on Discourse Development	12	7784	Janvier 22, 2024
Allow users to select Highlightjs theme Feature	0	407	Juillet 22, 2021
"New reply/prop/etc" highlight color has disappeared on only one of my themes Support	3	159	Mai 18, 2025
Codeblock Theme Picker Theme component official , codeblock-theme-picker	18	5152	Janvier 19, 2026

Change highlight.js styles?

Sujets connexes