[tejado]

Most vscode themes for me are hard to use as they don‘t highlight the areas enough. Example: I’m not able to see where the line starts as the code collapse arrow background color is the same as the editor... or the left menu is not highlighting enough the current one.

So I notice that I need more/better visual color differentiators so I changed a lot of colors. Has anyone the same issue?

[coldtea]

Yes. But it's relatively easy to fix it, you can add an entry in settings with color overrides for any combo of theme/UI element...

[tejado]

Yes I know. This is what I meant with „so I changed the colors“.

But anyway: I wonder why most themes are so badly colored so that I need to fix it myself....

[coldtea]

I'm not sure, but my guess is that almost all themes are attempts by developers, not people versed in color theory or knowledgable about proper contrast etc.