The second graph is a little better but even in that one the very similarly coloured blue lines cross each other so you have to really look closely to figure out which is which.
I tried one of datawrapper's sample data sets, "Gender pay gap" and added a couple of extra columns. The resulting line graph has four shades of blue.
https://datawrapper.dwcdn.net/g98Jd/1/
(There are "base color" and "customize colors" buttons so the author could have changed this. Seems like a nice little app).
I guess the point is ... I've seen many, many examples of worse graphs, graphs where the point was obscured or graphs that were deliberately misleading; so I'm trying to figure out how these two are worthy of appearing in a presentation.