Change page background

when I tried to add:

.blog .container > .row,
.page-id-68 .container > .row
{ background-color: rgb(248,188,136);
padding: 20px 0;
border-radius: 12px;
}

to page. It gave me This theme is broken. Template is missing.

to change the header, body and footer colour put this in the Custom CSS box in your theme options. Then chnage to any color you want

.tc-header {
background: #000000;
}

body
{
background: #000000;
}

footer#footer .colophon {
background-color: #000000;
}

but I only want to change one page not all the pages in my website;
I re-installed the childtheme, and copy more back up and covert rgb to rgba code. It still not change color of the page.

.blog .container > .row,
.page-id-68 .container > .row
{ background-color: rgba(240, 188, 136, 1);
padding: 20px 0;
border-radius: 12px;
}

Thanks.

try to add this instead:

body.single.single-post.postid-68 {
background:#000000;
}

As I used site5, even through I called the support more than daily and right now a few website like mine will migrate to new server today. It still have the problem and for a few hrs. WOW. No chance to test out your suggestion.

Thanks. I will let you know as server hosted in site5 resolved.

I put this into style.css
It did not work.

body.single.single-post.postid-31 {
background:#F0BC88;
}