Go to the "journal" tab and select "customize journal style." That will bring up a page named "Journal Display." In the theme section, there are categories like "Page text," where you can change the color. You input the #RRGGBB color into a box. I'm not sure exactly how you have yours set up, but look for a text color that is the same as the background. #003300 sort of looks like your background color, but it might just be close and not the exact same thing. (There are a bajillion different options for color making.) If I make make a suggestion, because your comments box is a rather dark green, a light color like #ffff99 might look good. It is a very light yellow/peachy color. If you are worried about messing it up, save the page somehow so you can see how it was before you started. Hope this helps!