I previously found a ccs code to change the background color of all my portfolio pages:

.container-wrap {
background-color: #1d1b1d !important;
}

But I need a way to change the color of individual portfolio items when you go to their specific page, is there any way to do this.

Morten

Found out how.
For anyone interested, just paste the css code into the custom css box on the page you wish to change it for.