- Acme Themes
#96551
acmethemes
Keymaster

Dear Bryan,
By default, it is not possible to remove the giant white box as it is the main part of the theme. It will require customization if needed. If you want to change its color then you can add the given CSS code in the Additional CSS
Appearance > Customize > Additional CSS

.wrapper {
    background: #e66b6b;
}

Best Regards!