How to change background color of the feature blocks

Here's where to change the background color of the features blocks

Go to Appearance > Editor > Stylesheet (style.css)

Scroll down and look for the code below and replace the hex color code of the background.  You can also change the color of the border and shadow if you like.

.features {
    background: #454545;
    border: 1px solid #585858;
    border-bottom: 3px solid #404040;
    padding: 18px 18px 0 18px;
    -moz-box-shadow:    inset 0 0 10px #5F5F5F;
    -webkit-box-shadow: inset 0 0 10px #5F5F5F;
    box-shadow:         inset 0 0 10px #242424;
    border-radius: 1px;
    position: relative;

After you have made you changes, click the Update File at the bottom of the editor field to save your changes.

Here's a sample where I have changed the background hex color code from #454545 to #FFFFFF