Every other line is unreadable until you click on it.

The main point of this article is to share the existence of the tool gammaray.

It can give you a hand in finding out the widget names and settings you need to style Calamares.

We investigate an issue we have had for a few months now.

We also show you to make a dump of the Calamares widget tree.

You will find it in /root/.cache/calamares/session.log.

Shown in the video

#mlistFlags {
alternatingRowColors: false;

Not shown in the video (full disclosure)

QListView::item:alternate {
color: #58B2D7;
color: black;

After some further testing I am convinced the QListView code is the actual code being at work to solve my issue.
And not the mlistFlags.