That's just the Background Color from the category's edit page in the admin panel.
error: [acp] Failed to fetch latest version
HTML not being sanitized
How do I set privileges for moderators or other users?
How to moderate guest posts?
Solved NodeBB Plugin - Changing a variable inside a function
Bug: Admin Notification Options Not Saving
NodeBB behind Firewall
Notification on tags?
Looks like your connection to NodeBB was lost, please wait while we try to reconnect.