.jpg img white background clashes with html page white background
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My site uses a .jpg jpeg image as the top-of-page image on all pages of the site.  The image was created with a white background.  But using the **img src="topOfEveryPageImage.jpg"**  tag shows that the image's white background is visually different from the rest of the solid white background of the browser page.  The 'white' of the image is noticeable and not the same as the white of the browser page.

Yet the image was created on the very same computer using a .jpg authoring program.   And in the .jpg authoring tool, the image's white background looks like solid white and identical to the white of the browser window if I launch the browser on the same computer.


Is the "img" html tag interfering with the .jpg background color?  Here is the actual code:

    <a href="mysite/landingPage.php">
       <img src="mysite/images/topOfEveryPageImage.jpg"
       alt="mysite/images/topOfEveryPageImage.jpg"
       </img>
    </a>