How to get div to resize to width of contents?

[softwareguy74]

I have the following code:

    <div style="background-color: Blue;">Line 1</div>
    <div>Line 2</div>

What style information would I add to the first div so that the blue background is only as wide as needed for the text?

Currently, the div is expanding to the full width of the browser window.

Thanks.