Changing Background color of Home Page (Responsive Theme)

I am trying to change the light gray colored background to a light green, which I’ve done successfully to other parts of my site.

This is my site:

https://flatlinedcharters.com/test/

The area I am trying to target is the gray to the right and somewhat below the aerial image…

I’ve already tried edtining these css selectors:

#wrapper {
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
background-color: #CAFFF5;
border: 0px solid #e5e5e5;
border-radius: 4px;
clear: both;
margin: 0px auto 20px auto;
padding: 0 20px 20px 20px;
position: relative;

.col-460 {
background: #CAFFF5; }

#wrapper .clearfix {
background: #CAFFF5 ; }

#featured .grid col-940 {

background: #CAFFF5; }

#featured-image {
background: #CAFFF5; }

body {
background: #CAFFF5; }

(I am kind of just shooting in the dark with some of my attempts above, but i figure I might as well try everything and work backwards if it works)

Anyway, this has been somewhat successful but I just cant figure out where that light gray on the right in coming from…

While I’m at it, I’m also having trouble locating the correct selector to alter the colors of the widgets below as well.

Thank you for any help. It’s much appreciated! As always!