Change Wordpress Dashboard Text Color

Hi all, I'm writing a plugin for a client that wants a custom background on the admin area and I see my self to change all the text on the gray section (f1f1f1) of the dashboard to white and also change the color of the links (a).

Now my question is, how can I override the color of the text on the admin dashboard to white, and be compatible with other plugins with no issues, (the postbox are gonna be white) the background image is black.

Thanks for the help.