Personally, I find these new background colors to be far too similar to the surrounding background. I'm unable pick them out at a glance, which is the point of lsp-enable-symbol-highlighting.
I didn't have this problem before this commit that sets these backgrounds explicitly. Before, I found the colors to be aesthetically pleasing and easily distinguishable.
I suggest choosing different colors, or maybe reverting the change altogether? Barring that, can you tell me how to restore the old behavior in my config? I tried this:
(set-face-background 'lsp-face-highlight-textual nil)
(set-face-background 'lsp-face-highlight-read nil)
(set-face-background 'lsp-face-highlight-write nil)
... but then I get no highlighting at all.
Screenshots:
Thanks!