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Image: Lightly Colour Scheme Alpha - available through System Settings and Pling.

Image of Lightly Colour Scheme "Alpha" - available from System Settings and Pling

This Q/A explains how to install Lightly Application Style to KDE Plasma.

After installing you probably want to make Colour Schemes transparent, and the instructions are provided in https://github.com/Luwx/Lightly

You can also download pre-made Lightly Colour Schemes through System Settings or for example from Pling

H2onvety
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    Hi there H2onvety - your answer is really useful but the question as written is a little confusing. I thought Archisman Panigrahi's edit made it easier to understand what the question was about without changing the meaning. Perhaps you can rearrange and reword the question a little along these lines but keeping all the points you want to mention. – Zanna May 08 '23 at 06:46
  • @Zanna Thank You for your kind words. What Paningrahi was trying to ask, is how to make color schemes transparent, and the answer is in https://github.com/Luwx/Lightly and it would require an own answer. This Q/A is only about installing Lightly. Would you please read if my Q is now clear enough. – H2onvety May 08 '23 at 13:14
  • Most of this question seems like it should belong in the answer - everything except the title seem like instructions. – muru May 08 '23 at 13:44
  • It looks fine to me. I agree that some of the content might be more what we expect to find in the answer, but it's now clear what it's all about, thanks! – Zanna May 08 '23 at 15:55

1 Answers1

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In Plasma 5.24 you can use the original instructions in Luwx/Lightly.

If you use the original instructions in Plasma 5.25 - 5.27, Dolphin titlebar will be fully transparent - not blur as it is supposed to be.

The original instructions also do not work anymore in Arch and Manjaro Linux.

Install in Plasma 5.25 - 5.27

Ubuntu derivatives

(1) Install dependencies

sudo apt install cmake build-essential libkf5config-dev libkdecorations2-dev libqt5x11extras5-dev qtdeclarative5-dev extra-cmake-modules libkf5guiaddons-dev libkf5configwidgets-dev libkf5windowsystem-dev libkf5coreaddons-dev libkf5iconthemes-dev gettext qt3d5-dev

(2) Download package from Boehs's fork

git clone --single-branch --depth=1 https://github.com/boehs/Lightly.git

(3) (Move Lightly to a preferred location and) Inside Lightly directory create directory build

mkdir build

(4) Inside build directory install the package with

cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_INSTALL_LIBDIR=lib -DBUILD_TESTING=OFF ..

and

make

and

sudo make install

P.S. Remember to uninstall previous Lightly before installing new one with sudo make uninstall in build directory.

How to enable it

After installation, open System Settings, go to Appearance -> Application Style, and choose Lightly.

Then, also in Appearence, go to Window Decorations and choose Lightly.

You may have to logout and log back in for the changes to take effect.

For those interested, here is how to install it in other distros.

Arch and Manjaro Linux

((1) Install base-devel with Manjaro Package Manager.)

(2) Install dependencies

sudo pacman -S breeze-icons frameworkintegration hicolor-icon-theme kdecoration kwayland cmake extra-cmake-modules git kcmutils
kdecoration qt5-declarative qt5-x11extras

(3) Download the package

git clone https://aur.archlinux.org/packages/lightly-git

(4) Install the package (inside the Lightly-git directory) with

makepkg -si

OR

makepkg -sric

(to clear orphan unneeded packages - Didn’t test it myself)

Other Linux distributions

I don't know. The original instructions may or may not work.

P.S. No blurred Dolphin titlebar still after installing everything as supposed? - Remember also to change Window Decorations to Lightly...

NOTICE:

with Lightly application style (especially full glass Lightly), opening VLC Video player installed from Ubuntu repositories OR from Snap MAY CAUSE the Whole Plasma Session TO CRASH.

... So instead, if you are using Lightly install VLC from Flatpak - It works OK with Lightly.

With MPV Video Player the blur in Plasma desktop may/will also disappear (blur in panel and Dolphin) if MPV is installed from Ubuntu Repositories.

A very good Lightly installation manual in YouTube: https://www.youtube.com/watch?v=VIrYPFY25G4

H2onvety
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