faf was designed to be dark so a bunch of text there is white - and im not sure if you can change that - although im 99% sure that you can. you will need to go through the same process i did - look in the .ui files and find the element name you want to change - then add it into the stylesheet.
another thing you might find useful: changes outside the client.css require a refaf. changes inside it require you to go to Options>Theme...>Reload Stylesheet - this is much faster.
also i personally dont really like white theming so yeah (more tiring for the eyes) |:
Spoiler: show