how to make background non transparent white in css code example

Example 1: container transparent text opaque

.mycontainer {
    background: rgb(60, 60, 60);
    background: rgba(60, 60, 60, 0.4);
}

.mycontainer a {
    color: #fff;
}

Example 2: background having opacity and text above to not have opacity

background-color: rgba(255,0,0,0.6);