Hello,

Sorry for the late reply.
Please go to Customize > General > Custom Codes > Custom Css and add this code:

.single-post .cl_page_header .overlay {
    background-color: #161616;
    opacity: 0.8;
}
.single-post .cl_page_header .bg-layer {
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: scroll;
}

Change the values to your wish.

Best regards!

Hello,

Yes, sorry for the misunderstanding. The option above is available for the page’s page header overlay.
I added the previous code in your Custom Css box and edited the color. You can see now the overlay is already whiter.

Best regards!