Where is the Background Color to be changed ?

Support Basics & Interface
1

Hi,
can’t find where to change the background color of the background.
Where is it ?

/uploads/default/original/4X/0/0/c/00cf80caa04d06dcc0267c1c1846ea2023665584.jpgstc=1
Image__2016_06_19__1466342055.jpg871×620 107 KB

Attachments

Image__2016_06_19__1466342055.jpg871×620 107 KB

2

Go down the the bottom of the panel and change the ‘Gradient High/Off’ colour