Do you have a custom css plugin or area within your theme?
This is controlling the colour of your sidebar:
.col1 .content {
background-color: #e5f4f4;
}
This is the content of your header and content:
.custom-background .hentry, .custom-background .main-navigation {
background-color: #e5f4f4;
}
And the background of your of logo is already in the picture, so you will need to change this in photoshop or another image editor.
Ok! That fixed it! Thanks 🙂