Pagination nav font same color as box/button, can't see text

Pagination font color on WP RSS Aggregator is red, box around text is solid red. So text is not legible until hover – then text is black.

Theme Minamaze, has pagination as follows:
Current page, active – solid red box with white font.
Other pages, not active- white boxes with red font, only text is visible.
Hover other pages – red border appears around white boxes, text unchanged.
See: http://toni-esl.com/blog/

Plugin WP RSS Aggregator pagination renders as follows:
Solid red box with red font.
Hover – black font
See: http://toni-esl.com/teach/blogs-for-teachers/

I would be very satisfied with any font color for WP RSS Agg navigation text other than red.

Thank you for any input

https://wordpress.org/plugins/wp-rss-aggregator/