It's not white by default.
In your theme global.css, what colour do have set in the container tag? Posting a link to your site might help.
#container {
color: #333;
}
I have this
#container {
color: white;
text-align
and so on...
replies here might help
(there are many topics with similar issues & with required code suggestions)
Is there a reason why you have made it white? Change it to the default value of #333 and see if that solves the problem.