How to Enable Dark Mode for Applications on Kali Linux 2019.2?
Step 1: Click on 'show applications' in dock.
Step 2: Search for 'gnome tweaks' tool, click on it to open it.
Step 3: Click on 'Appearance'.
step 4: Click on drop down next to, Applications.
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https://www.youtube.com/watch?v=afs57Bwe7mY