Twenty Twelve - Background color applies to the entire page

[rw-ye]

Quick summary

The background color on the Twenty Twelve theme applies to the entire page, instead of just the background surrounding the page on AT sites.

Simple sites are not impacted.

Steps to reproduce

1. Make sure your site is Atomic
2. Go to Appearance > Customize > Colors & Backgrounds
3. Set the background color to any color.
4. The color is applied to the entire page.

What you expected to happen

For the background color to apply to just the outside background and not impact the page content. Below is how it looks on a Simple site.

What actually happened

Background color impacts the entire page

Browser

No response

Context

No response

Platform (Simple, Atomic, or both?)

Atomic

Other notes

No response

Reproducibility

Consistent

Severity

Some (< 50%)

Available workarounds?

Yes, easy to implement

Workaround details

CSS Workaround:

.site {
    background-color: #ffffff;
}

[mrfoxtalbot]

I cannot replicate this on my testing AT site https://mrfxvanillaat.wpcomstaging.com/

I am going to close this as "cannot repro" but please feel free to reopen it if you can still replicate this consistently (no plugins, etc). If you can replicate, please share a direct link to the site. Thank you @rw-ye!