Visual too dim to be seen

[One-In-Dark]

I found the Visual highlight group not bright enough to be easily identified, which in my opinion is wanted for nvim-surround users. When changing paired delimiters, I can barely see them highlighted:

A workaround is to add special support for NvimSurroundHighlight, I suppose, but the Visual highlight setting should be a problem anyway.

[One-In-Dark]

Some additional info here.

With the greyscale colors at hand, I struggled to find a better color for NvimSurroundHighlight 😢 (nvim-surronud plugin, see :h nvim-surround.config.highlight)

a.sel is too dim as is depicted above, while a.ui is too bright to be a background color. I cannot help with this, in the absense of a new greyscale color.