Jetbrains change GUI color
I am currently using the darcula theme for PhpStorm, WebStorm and IntelliJ. However, one time randomly new colors appeared for the window name and file chooser dialog. In the first image is the upper bar/window name of PhpStorm, the upper row is black and the lower row is gray. The upper bar used to be just a lighter gray. The second image is the window that opens whenever I want to open a file/project. This used to be the light gray/gray, the same as the editor itself. Now, the files and folders are barely readable. I am working on a macOS High Sierra version 10.13.6. The IDEs are all updated to the latest version. I tried starting fresh (not importing the settings) after an update but that didn't help. When I change to a different theme, all colors change as well, but the darcula theme always has these problems for me. How can I change these colors back to their original form or change them myself?
Window name:

File chooser dialog:

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Known issue: https://youtrack.jetbrains.com/issue/IDEA-228316. Fixed, you can test this in RC build.
Can confirm the window header and dialog are light colored now. However, all my files and folders have a gray background. Does this have something to do with an IntelliJ IDE or something with finder eg.?
This also should've been fixed in RC build: https://youtrack.jetbrains.com/issue/JBR-2005.
1) are you using Material UI theme? If you do - disable the plugin and check again.
2) try switching to a more recent JDK version with the help of this article. You can use this one for example: