Solution for this topic

Please try using the below CSS code instead.

body.single-fw-portfolio .sh-titlebar,
body.single-fw-portfolio.sh-footer-paralalx-init .content-container {
    background-color: #d0c0c0;
}

Solution for this topic

For the blog page use the below CSS code.

body.blog .content-container {
    background-color: #d0c0c0;
}

Solution for this topic

For single post use the below CSS code.

body.single-post .sh-titlebar,
body.single-post .content-container {
    background-color: #d0c0c0;
}

And for single page use the following custom CSS code.

body.page .content-container,
body.page .content-container .sh-section {
    background-color: #d0c0c0;
}