Hello @melanie-czarnik,

This is the example for how you should use the CSS to make the background-color of the specific page/post according to your choice. Target the page-id from developer tools.

/* This is for posts, without including header */
.postid-182 {
	background-color: #d33;
}

/* This is for posts, with including header */
.postid-182 #masthead {
	background-color: #d33;
}
/* End for posts */

/* This is for page without including header */
.page-id-1785 {
	background-color: #d33red;
}

/* This is for page without including header */
.page-id-1785 #masthead {
	background-color: #d33;
}
/* End for page */

Here change the color code as per your requirement.

You can get the id of the page/post by going to individual post, page edit screen.

Screenshot:
http://prntscr.com/lpx3l5

Hope this helps.

Regards!!

Hello @melanie-czarnik,

Glad we could help you.

If you have any issues further, please let us know.

Thank you.

Regards!!

Hello @radhamisra,

Glad we could help.

If you have any issues further, please let us know.

Best Regards!!