Hello,
On my blog, www.veggie-wedgie.com,
I am trying to figure out how to make the whole post container have a white-opaque background color (Only the post container box) so that the post is easier to read.
Does anyone know a code for this?

So far I have used this code
filter:alpha(opacity=60);

but that makes the pictures and the text transparent as well. I just want to create a box (where the post will be in) that is slightly more opaque than the background of the post only.
Need code

Any help will be appreciated.

Anyone that might know the answer?

You would do this within the Atahualpa Theme Options. Take a look in ATO>Style POSTS & PAGES. Try adding a background in the appropriate boxes there.

I just wanted to add that I like the transparent background for what it's worth. I would however add fixed to the end of the background image code so the background doesn't scroll.

Thank you, all fixed. I made the transparency on photoshop and saved it as a png image.
I will do that!

One other thing I noticed is that you page loads a bit slow. That is at least partially because some if your images are quite large. For instance the second picture down is over 300 Kb. They should all be less than 100 Kb.