I am using KDE Plasma, Currently the taskbar panel is looking like Windows. Can we make it transparent ? If Yes, How ?

  • Please see the new answer here. If it works, I suggest you "unaccept" my answer and accept the new answer instead. – DK Bose Oct 10 '19 at 9:21
  • @DKBose Yes new answer working; I'll update. Thanks – TheLittleNaruto Oct 20 '19 at 17:04

Method 1. Makes panels transparent without altering the theme. Go to System Settings | Window Management | Window Rules. Press New... button. Give some description to the new rule, Dock Transparency, for example. Then select only Dock (panel) in "Window types:" field. Switch to the last tab and set these options:


Press OK then Apply new settings. Change 65% to whatever you see fit.
Tested in 16.04 with Plasma v5.5.5.
N.B. As @clearkimura noticed, this method may make other objects on the panel (i.e buttons and text) more transparent, so don't use too low values in that case.

Method 2. This will require altering the default theme. Make a backup of /usr/share/plasma/desktoptheme/default/metadata.desktop. Open it with root rights. Change in the [ContrastEffect] section enabled=true to false. Re-login.
Now the panel(s) become semi-transparent. As a bonus the main menu also becomes semi-transparent with blur effect under it. Also tooltips share this effect which resembles frosted glass. Take a look at the screenshot:


Strictly saying this method doesn't change only taskbar panel, as it affects other objects of the interface, but this effect satisfies me more than only transparent panel.
Kudos to reddit guys for the idea.

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    +1 Tested working in Kubuntu 18.04 via VirtualBox. Except, the window rules method will cause the panel to be transparent entirely--the icons, fonts, and panel background--that means the effect is not independent of each other. – clearkimura Oct 10 '19 at 9:29
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    @DKBose No, window rules should apply instantly, without leaving the session. – whtyger Oct 10 '19 at 9:35
  • I think it looks quite decent in Kubuntu 19.04: i.stack.imgur.com/wbAuk.png @clearkimura I'm using the icon-only task manager but even for other things, the text seems unaffected. – DK Bose Oct 10 '19 at 11:00

Edit: Please see whtyger's answer for changing panel transparency without the need to installing a new theme.

whtyger's answer provides the way to change panel transparency of your existing theme.

If you want to try other themes offering transparency, open System Settings > Appearance > Workspace Theme > Desktop Theme and click on Get New Themes. In the window that opens, enter something like panel transp in the search box and choose the sort order you want.

Get new themes from KDE Store

I came across one:

Theme offering transparency

Of course, you'll need to find a theme that's developed for your version of KDE Plasma.

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  • +1 because custom theme might work better out-of-box. The expected result is that only the panel background would be transparent, and should not affect the icons or fonts of widgets on the panel. – clearkimura Oct 10 '19 at 9:34
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    @clearkimura I've updated my post with another method. It won't make text faded as the first one. – whtyger Oct 10 '19 at 11:31

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