[Theme Horse Support Team]

Hi Arjen,

To change the background-color of the sidebar go to Appearance -> Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button:

#secondary {
    background-color: pink;
    padding: 2%;
    width: 27.28%;
}

And for the white color you can change it from theme option.

Thank you!

Thank you!