页眉宽度(H1, H2等)

I want my headers (h1 through h6) to have a background colour (different to that of the page background), I also want the width of this background to be the same as the width of the text in the header, plus padding (Not the width of the container that the header is in, which is what is happening now).I want my headers (h1 through h6) to have a bac