Color difference between PNG and JPG in Save For Web

I am working on a website and I while building images for the site I am using a mix of png and jpg images. When I "Save for Web" the same source image creates two different color images when I save them as either png or jpg. How do I make sure the images are saving with identical colors in both png and jpg. Thanks

>My working space is Adobe RGB but I'm not opening the sRGB PNG into Adobe RGB. I am choosing "Leave as is (don't color manage)" this should preserve the PNG's RGB numbers.
are you certain it is not being converted when you open it?
The numbers you quoted are the numbers I get if I open an untagged sRGB image into Adobe RGB (assuming Adobe RGB), and then convert to sRGB.
If I open my sRGB images, either PNG or JPEG, into sRGB, they always match. I've been working on a web site for the past 3 weeks, doing this regularly.
If you are working in Adobe RGB with sRGB images that are not tagged, you add a level of complexity that requires you make the right decision at every step. You need to open them without conversion, then assign sRGB, to keep working.
Or just open the images in Firefox 2, which cannot color manage, and see if the sRGB jpeg and the sRGB PNG match. This is the acid test.

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