Theme background color won't change when I change themes

[BP21]

Hi there,

I am using a theme with a black background at the moment (Mandy Miller).  There are no color options for this theme. I would like to switch to a white background and have tried several other themes that supposedly have a color palette. However, while I can see that the fonts are changing when I switch themes, the background remains black and changing from "dark" to "light" doesn't change anything. How can I get rid of the black theme background?

[seicolegwr · Accepted solution]

@BP2 

Are you sure you're using Mandy Miller? I ask because it's a Cento theme variant and that theme does include the option to change background colour for the body of the website, also the default colour is not black. 

To change the background colour on Cento click on an empty part of the webpage body and a popup should appear just below the nav menu. Click 'EDIT BACKGROUND>CHANGE COLOR and you can input any #Hex colour you want. Pure white is ffffff.

Hope this helps, Gary