Every app has a proper symbolic icon for high contrast mode.
Characters and Logs are missing an icon.
Amazon, Calculator, Remmina, Software & Updates, Startup Disk Creator, System Monitor, Thunderbird, Ubuntu Software are using fullcolor icons, in some cases different from default.
LibreOffice, Software Updater, Startup Applications and Transmission are using deprecated HighContrast icons.
Default Ubuntu 18.10 image.



Looks like all "ubuntu specific" apps/.desktop files are the problem and/or snaps.
I don't think that this is a yaru topic tbh
I would prefer to close this here and let @Exalm open this on launchpad
Where exactly? I always get lost on launchpad tbh
+1 closing this, those icons are not related to Yaru
@Exalm I think it should be ubuntu-themes on launchpad :) thanks for opening issues, we close this now here
Most helpful comment
Ok, https://bugs.launchpad.net/ubuntu-themes/+bug/1799440