White background so you can see what you're typing?

I added "add_theme_support( ‘qa_style’ );" to the functions.php file in hopes to fix a read/write issue with theme colors, but the Q&A portion of my site is still embracing the background so when you type all you see is grey letters against a navy blue background. How can I get this converted to a white background so that people can see what they're typing.