Image background color displays incorrectly on iPhone

Certain images on my website have an unintended appearance in iPhone.  For example, an image at the top of which says "Maui Tradewinds-- Welcoming the Traveler to Paradise".  This image is supposed to have the same background color as the page, but the background appears black on some iPhones.  

The reason I am using images, rather than text itself, is because I couldn't create the desired font by other means.  The backround was applied to these images by setting the Palette Transparency in Paint Shop Pro to equal the background color of the page.
The images look just as intended on desktops and notebooks, but not on some iPhones.
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Dave BaldwinFixer of ProblemsCommented:
"This image is supposed to have the same background color as the page"

There is no background color assigned to your body or wrap elements.
ddantesAuthor Commented:
Thank you for participating.  In style.css:
body {
background-image: url("../images/background.jpg");
Dave BaldwinFixer of ProblemsCommented:
background-image: is not background-color: so I don't know what you are talking about then.
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ddantesAuthor Commented:
Sorry for my lack of distinction with some terms.  The images in question consist of blue text against a beige, textured background.  That background is made from an image called background.jpg, which is also used as the background for the body of the page.  The desired result, which appears on desktops, is blue text against a background which is seamless with the rest of the page.  In some iPhones, what appears is a black rectangle with blue text.
Dave BaldwinFixer of ProblemsCommented:
Try converting your image to a PNG format with a transparent background.  Paint Shop Pro can do that.

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ddantesAuthor Commented:
I will try that.  Were you able to reproduce the observation about a black rectangle?
Dave BaldwinFixer of ProblemsCommented:
No, I don't have an iPhone.  By the way, which model iPhones are giving you problems?
ddantesAuthor Commented:
My own iPhone 5 and iPad 4th generation don't have this issue, although it has appeared once or twice.  I saw the black rectangle on three iPhones yesterday, while attending a graduation party.  I didn't think to notice what model of iPhone I was using.
Dave BaldwinFixer of ProblemsCommented:
Try the PNG but you need to find out who and what device is having the problem before you can know whether it can be solved.
ddantesAuthor Commented:
Will do, and thanks again.
Dave BaldwinFixer of ProblemsCommented:
Sure, let us know how it works out.
ddantesAuthor Commented:
Success!  My iPhone happened to have one if its intermittent moods, and it displayed the black rectangle around the title image.  Comparing that with the same image, saved in png format and converted to transparent background, the issue is resolved.  Great suggestion.
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