GitHub repo I've been experimenting with styling the Editor lately. What is Adapta Nokto? Adapta Nokto is the name of a GNOME theme originally used in Manjaro Linux. The inspiration to bring this to Unity was mainly kindled by this Blender theme adaption. How does it work? The majority of the Editor's UI is based on IMGUI. By using a method that's explained here, you can create your own custom theme with ease. The good thing is that it's always temporary: If you don't like it, delete it and the Editor will go back to its default state. Compatibility Note: This theme has been officially tested with 2020.3.24 only. I recommend to use it solely with 2020.3.XX. Editor versions 2021.X and higher are gradually shifting from IMGUI towards UI Toolkit. 2021.X.X • Yes, with limitations • Same as below. 2020.3.X • Yes, with limitations • Some UI elements have the default Unity skin coloring due to the use of UI Toolkit. These can't be modified. Installation Before you install: Adapta Nokto is built with Unity's Dark skin in mind. As such, you'll need to enable it. Please also note that it could potentially interfere with UIs from third-party assets! Use at your own risk. Should you encounter any anomalies, consider uninstalling it and discontinue further use. Do not bother Unity Technologies or developers of third-party assets with any bug reports - customizing the Editor this way isn't officially supported (and likely will never be). Via Package Manager: In the Package Manager, click the button and choose "Add package from git URL..." from the dropdown menu. Enter the following URL and hit 'Add': https://github.com/mauricepape/adapta-nokto-for-unity.git Manually: Visit the GitHub repo, click the green 'Code' button and hit "Download ZIP". Once downloaded and extracted, put the contents of the "adapta-nokto-for-unity-master" folder into your project's Assets folder. License Licensed under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). Another cool custom theme (not by me): https://forum.unity.com/threads/clean-light-editor-theme.1127993 .