How do i make all the text in my profile white?

I'm having a hard time making the text in my profile entirely white (black background + black text =no) but the code I'm using isn't working.

<style>body{color: COLOR !important;}</style> 

I used that code (from off the HTML ultimate guide) and it only changed the color of the text on the footer! 

any ideas ??

(side question: how do I make the width of my main profile page smaller?)

Thank u <3!!