Opacity for Background 1 and 2

Im trying to find a CSS code to allow me to make the background a bit see through, but not fully transparent, anyway help is appreciated I should add in we are using PunBB

Also a little help with getting the Chatbox monochrome or transparent, so that its not copying the Site Background over itself (would take picture to show, but i have no way of doing so)

Hey there @Yami Spike, use this code to fix your issue

Code:

body {
opacity:0.98;
filter:alpha(opacity=98);
}

Paste that into the CSS 98 is hardly see through so I would advise maybe 85 so then just use this

Code:

body {
opacity:0.85;
filter:alpha(opacity=85);
}