How to change the color of the title page of a template in LibreOffice Impress?

I am using the midnightblue template in LibreIffice Impress.

While I like the slides in this template, I want to change the background color of the elements in the title page. How to do that?

^{I like the style of the slides but I want to change the title page}

I am using Libreoffice 7.1 from the LibreOffice Fresh PPA, in Xubuntu 20.04.

Clarification: I want to change the background color of the title page (cyan and dark blue in this particular template), not the font color (which can be easily changed).

If I remember terminology correctly, then you need to edit properties of Master Slide, maybe its styles.

See for example the following chapter of LibreOffice Impress Guide - Chapter 2 Master Slides, Styles, and Templates .

From the PDF guide,

1. Open View → Master Slide.
2. Right click on the desired region, and click on Edit Style....
3. Area → Color, and you can choose your favorite color/gradient.