Readabe font for block quoptes?

Here’s a post I am working on.

If you look at the quotations, like the first one “From Wikpedia:” etc, the text is too faint for me to read.

The same is true of the text in this data entry form.

What (if anything) can I do to improve the readability on that any other block posts?

Yes, that should have said “Readable” But my eyes are going…