Hi,
Last year, I've tried to customize my slides for DebConf by using the
colors and logo from the website, and created some kind of a template so
it's easier to build the presentation. I've updated it for this year's
look as well. It's a bit close to the conference so I'm not sure how
useful it will be for others, but I'm attaching the two in case they are.
I've unfortunately used some "Master Slides" feature of LibreOffice that
appears to be buggy, and you might need some fonts (-montserrat, -lato,
-pretendard, -urw-base35) to get everything to render correctly, so just
be aware.
Alper