Created attachment 104097 [details] screenshot of the plasma launcher Breeze-dark uses dark gray on slightly-darker-gray text colors, thus text is badly readable. See attached screenshot of the the plasma launcher (a.k.a. "startmenu").
Please open the screenshot in a proper image viewer, not the browser. The browser doesn't show the correct background color of the .png image, it shows a slightly brighter gray tone, which would make this less of an issue. If you want to make sure you see the correct color, the best thing is to set your theme to breeze-dark and look at the original instead of the image.
This has since been fixed. We improved the colors of the text to increase contrast.