What is this highlight in a codeblock ?

[surgiie]

Im not sure if its something with my color scheme or plugin doing this but i have the following grayish white line highlight appearing on lines that have the code block start line: i.e triple ticks followed by language:

```<lang>

I guessed that it was the highlight RenderMarkdownCodeInfo highlight and tried clearing the guibg value from it but it doesnt do anything so im unsure how to remove this. Any help on this would appreciated.

[MeanderingProgrammer]

Yeah, this is a fairly common problem with transparent color schemes, haven't been able to find a solution that works in all cases.

The highlight that gets used for that section following yaml is a highlight generated at runtime. It's created based on the value of RenderMarkdownCodeBorder and takes the value of the background and applies it to the foreground. This is done to support custom border characters, but also leads to this problem in some cases.

Easiest fix is to set the highlight_border option to false:

require('render-markdown').setup({
    code = { highlight_border = false },
})

[surgiie]

@MeanderingProgrammer Can confirm this fixes it for me, thanks for the quick response and solution!.