Colors and logo opacity problems

Hey there! First of all, big thanks to the developer of the theme, it’s awesome!

I’m trying to desing a webpage for my rock band (www.tercerdeseo.com) and I’m having some troubles trying to modify the theme options:

– In the front page (the one with the logo when you enter the site) the opacity of the logo is not 1 unless your scroll down a bit. How can I change that? I’ve found the code with firebug, but I havent managed to change it.

– As you can see, the background image makes the text not so readable, and I was wondering if it’s possible to include the text of the pages in a box with a solid color (or transparent color) that makes it more readable, with the image still visible in the empty space

I hope I explained myself, thanks!