Change background color of one page only?

If you use Business Plan, add to Page Settings > Advanced > Header

<style>
  div#site {
    background: red;
}
</style>

If you use Personal Plan, add to Home > Design > Custom CSS

body#collection-5e2f261508f8621492f2bab8 div#site {
    background: red;
}

@tuanphan Worked like a charm. Thank you!

@tuanphan I have a business plan, but the code that you've outlined above doesn't work  when I inject it in Page Settings > Advanced > Header. I'm not a developer, so I might be missing something, can you explain like I'm 5 years old?

This is the page I would like to change the color of: https://www.kelseyeaton.com/thank-you (no password needed)
 
I would like the background color to be #F6F6F6, do I just put that in place of "red" in your code?

Thank you!

EDIT:  I do have a custom cursor, outlined in this forum post. Could that be causing the issue?

7 hours ago, k3ats said:

@tuanphan I have a business plan, but the code that you've outlined above doesn't work  when I inject it in Page Settings > Advanced > Header. I'm not a developer, so I might be missing something, can you explain like I'm 5 years old?

This is the page I would like to change the color of: https://www.kelseyeaton.com/thank-you (no password needed)
 
I would like the background color to be #F6F6F6, do I just put that in place of "red" in your code?

Thank you!

 

EDIT:  I do have a custom cursor, outlined in this forum post. Could that be causing the issue?

<style>
  .Main {
    background: red;
}
 header.Header.Header--bottom {
    background: red;
} 
</style>

2 hours ago, tuanphan said:

<style>
  .Main {
    background: red;
}
 header.Header.Header--bottom {
    background: red;
} 
</style>

 

AMAZING! Thank you!

For anyone else who needs a step-by-step:

I have a business plan (this code might be different for personal plans). In your menu, go to the page you want to change the background color on, then click on the cog to the right of the page name that's "Page Settings". Then go Page Settings > Advanced > Copy and Paste the code above. Add the Hex code of the color you want in place of "red". In my case it's "#f6f6f6".