[Plugin: flexo-facebook-manager] Overriding FB CSS styles

The flexo-facebook-manager does exactly what I would like it to do in terms of my site, but I have an issue regarding the color scheme.

The plugin seems to be referencing CSS files directly from facebook. The one I am specifically concerned with seems to be located here:
https://s-static.ak.facebook.com/rsrc.php/v1/yQ/r/hd7rQX4jhrj.css
It causes posted comment text to be a dark gray, which doesn’t show up very well at all against a black background.

I will keep tinkering with the code to try and override this, but as a wishlist item for the plugin, it would be very nice to be able to customize the colors.

For reference, here is a blog post from my site to illustrate. Facebook comments may be found at the bottom.