Sure, what’s the link to your site?
By default you can change the main background color around line 155 in your style.css –
body {
background-color: #fff;
color: #333;
font-family: 'Open Sans', sans-serif;
font-size: 20px;
font-size: 2.0rem;
font-weight: 300;
letter-spacing: .8px;
line-height: 1.625;
margin: 0;
}
Next you can either remove or change the background for the .site-inner
section around line 628 –
.site-inner {
background-color: #fff;
clear: both;
margin: 140px auto 40px;
position: relative;
z-index: 9;
-word-wrap: break-word;
}
The .site-inner
background color covers the main content and sidebar. You can change the width of that entire section if you wanted to add padding, border, etc