This is “just” a matter of creating a CSS file and adding it to the
repository. The hard part is to have the patience to create the CSS
file, at least for me, because the css classes are not descriptive
(ex: what the hell are class="ot" and class="op"?). I tried
finding ready to use ones but I could only find some on
tejasbubane/hakyll-css. I
chose the
zenburn
one.
Next steps are to copy paste its content to css/syntax.css then add
a link to the css file in templates/default.html:
<link rel="stylesheet" href="/css/syntax.css" />