Change BPC 10.1 Shell Background color

Dear Members

I need to change the color of the BPC Web Shell Background, we are on BPC Web Client 10.1, SAP_BW 7.50 SP12.

I have changed the color before and it worked with the below link steps, but after the upgrade the same code is not working anymore. Your new suggestions are highly appreciated.

https://blogs.sap.com/2016/10/21/customize-bpc-10.1-nw-web-ui-theme/ - How to Customize BPC 10.1 NW Web UI Theme

I have also checked the below post but no use ..

https://answers.sap.com/questions/12556027/change-background-color-of-the-bpc-web.html - Change background color of the BPC web

As of now I have this below code in Customer.css

/* ============================================================================================== */
/* For All Themes */
/* ============================================================================================== */
.sapUiUx3ShellBgImg {
background:#0a12ff;
}

/* ======================================================================== */
/* Logo */
/* ======================================================================== */
.bpc-shell-logo {
background:url(themes/bas/img_c/favicon.ico) no-repeat;
background-size:100%;
width:40px;
}
/* ======================================================================== */
/* Shell Background */
/* ======================================================================== */
html[class*='goldreflection'] .sapUiUx3ShellHeader,
html[class*='goldreflection'] .sapUiUx3ShellBgImg {
background:#0a12ff;
}
html[class*='goldreflection'] .slideClass {
background-color:#F5F2E8;
}

And I just have the below code in Customize.json

{
"title": "CUSTOMIZED TITLE",
"titleImage": "themes/bas/img_c/favicon.ico"
}

Regards

Uday Reddy