Description:
I often use a transparency gradient to make the Title more clear on a Book Cover (it helps fade out the background behind the text). Sometimes the background is not just a picture, but a color. I noticed, since the new 24 release, that some of these gradients produce reversed coloring, on export to PDF.

Steps to Reproduce:
1. Create a new document in Writer.
2. Make a custom Page Style for the page.
3. Right-click that Style and choose "Edit Style".
4. In the Page Style dialog, choose the Area tab, and pick a color.
4. Choose the Transparency tab, for Area Transparency Mode choose "Gradient."
5. Choose any of the first three Gradients: Linear, Axial, or Radial.
6. Set the Start value to 0%, and the End Value to 100%.
7. Choose OK to close the dialog.
8. Export to PDF. View the PDF.

Actual Results:
If you chose, for example, Red as the background color, with a Radial transparency, you should see (in Writer) a white center fading to red on the edges.

In the PDF, you see the opposite: a Red center, fading to white on the edges.

Expected Results:
This used to work fine in the 7.x release (and all other previous ones that I can remember over the last 8 years).


Reproducible: Always


User Profile Reset: Yes

Additional Info:
I'm not sure this is relevant, but I'm using an Nvidia RTX A4000 graphics card.

It's shouldn't be related to this particular computer, as I just set up another computer and did a fresh install of LibreOffice, and it has the same problem.

Also, it seems to be confined to the first three Gradient types: Linear, Axial, or Radial. The other three types: Ellipsoid, Square, and Rectangular, seem to work as expected.