Task switcher current app highlighting - dark gray on black - v. hard to distinguish

[Christian Sarrasin]

IMHO the highlighting of the current app on the 20.04 task switcher being dark gray over a black background (see attached screenshot) is nearly impossible to distinguish.

This may be suitable for the "dark" theme variant (people working in darkened rooms) but it should be possible to select a "Default" or "Light" variant that makes this a little more easy on the eye.

Attempting to adjust this in gnome-control-panel under Appearance-> Window colors has no effect. Using Tweaks, with the "User Themes" extension, under Appearance -> Themes, selecting "Yaru-light" for Applications and "Default" under Shell exhibits the same behaviour. Interestingly, there are only two choices under Shell: Default and Yaru-dark and switching doesn't change anything. Could the issue be that a Yaru-light gnome-shell theme is missing from the package?

I'm still unsure whether this is an install issue with my 19.10 upgraded deployment but having cross-checked the package content, I don't think so. My system is fully updated.

$ lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

$ apt policy yaru-theme-gnome-shell yaru-theme-gtk
yaru-theme-gnome-shell:
  Installed: 20.04.4
  Candidate: 20.04.4
  Version table:
 *** 20.04.4 500
        500 http://ch.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        500 http://ch.archive.ubuntu.com/ubuntu focal/main i386 Packages
        100 /var/lib/dpkg/status
yaru-theme-gtk:
  Installed: 20.04.4
  Candidate: 20.04.4
  Version table:
 *** 20.04.4 500
        500 http://ch.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        500 http://ch.archive.ubuntu.com/ubuntu focal/main i386 Packages
        100 /var/lib/dpkg/status

[Carlo Lobrano (c-lobrano)]

Hi, thanks for taking time to contribute. I agree this problem and a fix is ready, see https://bugs.launchpad.net/ubuntu/+source/yaru-theme/+bug/1871586

[Daniel van Vugt (vanvugt)]

The difference is pretty clear to me on a fully calibrated monitor but I guess it should also work for users who don't have that.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1871416, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.