Logo not showing on site but showing in the admin preview

Hey,

I just put a new theme on, the logo shows in the preview but not on the live site… No idea whats happening.

On another note there is no background colour – Some of the logo is white and the background on the theme is white so it really doesnt work.

https://decorationblog.com/wp-content/uploads/2018/06/decorationblog_final-1.png

So I need a background to go with the logo.

Thanks very much for any help ??

The page I need help with: [log in to see the link]