Thank you so much for the prompt reply .
I created the custom.css file and moved it to the JA Mason's css folder.
It has changed only part of the background of the whole template ie
my custom css is :
div.t3-wrapper {
background: #263750; /change to your desired color/
}
.btn-default.btn-sp:hover::before {
background: #fff; /change to your desired color/
}
.navbar-default .navbar-nav > li > a, .navbar-default .navbar-nav > li > span {
color: #ffffff; /change to your desired color/
}
In effect , I only changed #1c1c1c to #263750
You can see the partial change in the attachment .



Thanks once again . I am learning fast but still need some hand holding 🙂