Fix transparent mode

[llyyr]

Feel free to modify the colors used, I just picked whatever seemed to go best with the gruvbox palette in my opinion.

[crzdg]

Why do you propose those changes? I do not see a need to change those in transparent mode. Both highlights are visible.

I think there might be some interference with your config here. If you just want to change the color you can override the highlight-groups when you load the theme.

[llyyr]

Oh, it completely slipped my mind that you can use transparent mode without also having transparency with your terminal application. Oops, ignore this, probably doesn't affect anyone else.