AI-generated summary
The discussion revolves around changing the background color of category icons in the sidebar, with users exploring the use of category icons via a theme component. Zard_W initially asked about displaying icons and later found a solution in the theme library. Moin provided guidance on using category icons and explained that icons require a defined color, referencing a related Meta Discourse post Moin. Jagster noted that the feature didn’t work for them, later realizing they hadn’t set a color, and mentioned their users rarely use the sidebar. Zard_W humorously forgot to close the topic, prompting Moin to clarify that solved topics are automatically closed, with moderators able to close them manually. Manuel explained how post edits are tracked, and Zard_W noted that two replies were merged, which Moin clarified was done by a moderator. Zard_W appreciated the quick response. Manuel added that a PR was submitted to render icons with default category colors when no color is defined.
Interesting. That doesn’t work for me. And hasn’t ever worked.
Did you define a color?
Where the heck do I set that 
On category icon component, of course. Damn I’m in slow mode today.
But now you said that I have a weak memory print I didn’t use colors because then category nav bar was too reckless. And ’cos about 95 % of my users are typical end user with mobiles, no one uses sidebar. So this isn’t any bigger thing in my circles.
But good to know, thanks!
hahaha, I fotget to close the topic, I have found this theme component in library.
still thanks!
Is there any place to close the topic here?
Support topics which are solved are automatically closed
In addition, leaders can close topics manually when needed.
Why are these two posts automatically categorized together? 
I sent two replies, but now they are merged to one.
all right! it’s so fast! 
Thanks for the reminder 
Just picked this up and did a PR so icons are rendered with the default category color when there’s no color defined on the component.