Markdown plugin - change color of highlighted text

Hello!
I use the kirby markdown field and I would like to change the highlight color.

The default color is too transparent and I want it to be more bold. Therefore I tried to use a custom-panel.css file which I attached through the config.php file like this:

<?php

return [
  'debug' => true,
  'panel' =>[
    'install' => true
    'css' => 'assets/css/custom-panel.css'
  ]


]; ?>

and in the css file I changed it as I managed to change in the inspect:

.cj {
    background: rgb(243 255 0 / 68%) !important;
}

unfortunately nothing happened…
this is how I would like it to be:

any idea how to achieve this effect?
Thanks in advance!

I don’t quite understand where you get that .cj class from. I think you should overwrite the

    --cm-color-highlight-background

CSS variable

thanks it works!

Actually the problem was that I forgot to add a comma in the config file so the css wasn’t applied.