Calc - how to darken the dashed page break line

Wow, my first post. Libre Calc Spreadsheet. The Page Break dashe/broken line is to light for me to see. How can I darken just that line and not all the grid lines??

I have not found a solution for the page break dashed line.
But if you color the grid lines from gray to, say, Light Brick 3 color, the page break line is better to notice…

Choosing menu Tools - Options… - LibreOffice - Application Colors, under Spreadsheet there is a Page breaks that seems not to work. No bug report found yet.
With me version 7.1.8.1.

By the way, choosing menu View - View Grid Lines could be of help here.

EDIT: I see now that it is needed to change Automatic page breaks color, no Page breaks color.

(after a bit of study)

Choose menu View - Page Break.

It will show a continuous dark line. Here Application Colors Page breaks options works.

Choose menu View - Normal to exit Page Break view mode.

Yeah. Under ‘view’ page break, the Application Colors does work. When you switch back to Normal View, the page break lines (dashed/broken) remain, but are barely visible. I wish they were darker in order to avoid them while working.