CSS title image

[rlawton1]

I am trying to set a title image using css within my custom theme.

I have managed to set the background colour blend and the font colour but i cant work out how to set the image.

I have tried the following with no luck.

.sheet-title-logo-img {
background-image: url("https://www.qlik.com/us/-/media/images/qlik/global/qlik-logo-2x.png?h=94&w=308&la=en&hash=12D34BE69F...");
}

.sheet-title-logo-img.ng-scope {
background-image: url("https://www.qlik.com/us/-/media/images/qlik/global/qlik-logo-2x.png?h=94&w=308&la=en&hash=12D34BE69F...");
}

.sheet-title-logo-img.ng-scope {
background-image: url("https://www.qlik.com/us/-/media/images/qlik/global/qlik-logo-2x.png?h=94&w=308&la=en&hash=12D34BE69F...") !important; 
}

Does anybody know what i need to do?

Thanks