How do I set the header to be transparent?

[Alberto da Silva]

I would like to set the background color of the header to transparent using CSS but I have only managed to turn it white so far ( I tried changing the word white to Transparent but it didn't work). Can someone please assist me with this?

This is the CSS that I'm currently using:

[dsid="mobilecontainer"]
{
background-image:url("../../../../files/views/assets/image/White_Background.jpg");
background-repeat:no-repeat;
background-size:cover;

}

.classHeader{
background-color: white !important;
color: black;

}

[Serhii Kulibaba]

Hello Alberto,

Please add next CSS for the header "mobileheader":

pre[name=mobileheader]{
background: rgba(0,0,0,0);
}/pre