Change the white colour in between posts

[AutoItScript]

I want to make it easier to see between posts while reading the topic, it's too white and washed out for me at the moment so I just want to darken it down a touch. It's the part that is almost a container for the entire topic and flows inbetween each post. It looks bright white.  I've changed every single colour in the editor for buttons, front end and text and none of them affect it.

[craigf136]

#ipsLayout_mainArea, #ipsLayout_sidebar {
    background: none repeat scroll 0 0 #insert hex choice;
    box-sizing: border-box;
    display: table-cell;
    height: 100%;
    vertical-align: top;
}

 

[craigf136]

Alternatively you can change the border

.ipsBox {
    border-color: #insert hex choice;
    border-radius: 3px;
    border-style: solid;
    border-width: 1px;
}

 

[AutoItScript]

Thank you. Surprised it's not one of the colours you can easily change!