Change coloring of headline in preview window

Hi!
I want to change the color of the headline in the preview window. (See below.)
Does anybody know which entry in the cinnamon.css corresponds to it?

Thank you!

I can’t test it, I am on KDE, but try to find something like this:

.grouped-window-list-item-box .top,
.grouped-window-list-item-box .bottom {
  ......................
}   

Search for the color value inside the {…} and try to change it to the value you want.
Keep backup the original.

Hi!
There are entries of this type

.window-list-item-box {..}

under the comment

/* ===================================================================
 * Window list (windowList.js)
 * ===================================================================*/

However, they effect the window list that pops up upon pressing “Alt+Tab”.

I’m looking for something task bar related. (But thanks anyway. Still learned something interesting.)

It is not easy without the theme, but:
In your theme folder, open the folder panel. Maybe there are 2 svgs with the line one up the other down. Open them in a text editor, find the color and try to change it.

I downloaded a random theme and changed one:

Hi!

It is called “Serena” and seems to be mildly odd. It contains significantly less files and folders than most of the other themes, that i have downloaded. There is no “panel” folder an no window-list-active-*.svg.
You really don’t need to download this one. The coloring is just a minor inconvenience and you’ve already done more than expected.
Thank you!