To enable dark theme on elementary OS 5.0 "Juno", simply use Elementary Tweaks and set Prefer Dark Variant on. But there are more ways, using command line instead or install new dark themes. And the is one more thing, that is giving the Plank Dock dark theme as well.
(Dark user interface on elementary OS)
I use here themes like Elementary X, Deepin Dark, Flat Remix Yellow to show you several options we have today. Try it and happy working!
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Using Tweak Tool
Go to System Settings and open Tweaks section and turn on Prefer Dark Variant. Then close all running applications and start one. It must be in dark theme right now. If you do not have this tweak tool, install it first.
Using Command Line
Run this command line to switch to dark theme:
$ gsettings set io.elementary.terminal.settings prefer-dark-style true
And run this to revert back to light theme:
$ gsettings set io.elementary.terminal.settings prefer-dark-style false
Running those commands are the same as switching the buttons on the Tweak Tool above.
For Plank
By default, without installing any dock theme, simply switch the built-in theme to Matte. Hold Ctrl > right-click the dock > Preferences > switch it.
If you want custom theme, Elementary Dark by Childishgiant is good. To install it, simply extract the theme into ~/.local/share/plank/themes/ and switch it using dock preferences above.
Theme: Elementary X by Surajmandalcell (GTK3)
https://www.opendesktop.org/p/1231691/
This is the theme I used as the screenshot above. Just download the elementary-x.zip and extract the folder into ~/.themes folder. If the folder does not exist, simply create it. To enable it, go to tweak tool again and switch it to elementary-x-master theme. These installation steps are the same to other themes below.
Theme: Deepin Dark by Umayanga (GTK3)
https://www.opendesktop.org/p/1190867/
This theme is similar to the dark theme of Deepin OS.
Theme: Flat Remix GTK Yellow by Daniruiz06 (GTK3)
https://www.opendesktop.org/p/1293697/
This is one among the colorful theme series. This yellow selection has several different versions and the borderless one is good.
More Themes!
Go to OpenDesktop.org to find more GTK3 themes and also Plank dock themes. You will find many many more themes to try. Enjoy!
This article is licensed under CC BY-SA 3.0.