Share Web 2.0

Hi,
How can I make a web graphic with a transparent background in photoshop? I tried File > Save for web > PNG-24 with transparency checked but when I publish the image in my web page a colored background (#dfdbdc) appears. I have also tried Help > Export Transparent Image , but it did not help.
I appreciate if anyone advise .

I accidentally changed my text background color on myspace blog and im trying to make it transparent with the color the blog is but there is no same color. And i dont want to redo the blog over again. Does any one know how to make it transparent?

swarovski rhinestones