Color change in PDF

Hi,
I have multi-page layout, that is exported as pdf.
The indesign file has a background gradient set in the master page.
The issue:
The exported PDF file, when opened, changes the background image colour to a different type of blue, then the one in the InDesign document.
PLEASE NOTE: this does not happen always. Majority of times when the pdf is opened, the actual color given in the InDesign document is shown.
What is the reason for this change of colors (each time it is opened).
Please help.

Hi, I recently came across a similar, if not the same, issue.
For some reason setting a box's color using the color picker wasn't sufficient for making the change permanent in my case.
I would select the box, change the color to 60/40/40/100. Then I'd save it and print it using Postscript settings. (Transparency blend space set to CMYK; Profile set to US Web Coated (SWOP v2); Output color settings are CMYK.) Make PDF using Distiller. (PDFX1a: 2001 settings) Open PDF in Photoshop using CMYK setting, sample color. Result? 75/68/67/90.
Then I'd click back over to InDesign and select the box, check the color in the color picker, and it would be 75/68/67/90. WEIRD.
So, i'd set it back to 60/40/40/100. Go through the print process again, and nope! Once I checked the color on the box again, back to 75/68/67/90.
So, I deleted the box. Set my color picker box to 60/40/40/100, then re-drew it. The printed it. Then checked the color.... 75/68/67/90.
Ok, set the color picker to 60/40/40/100, define a swatch. Apply swatch to box. Print to postscript, go back to InDesign, select box, swatch no longer applied. No swatch associated with box. What the hell?
Ok, reapply swatch. KEEP THE BOX SELECTED WHILE SAVING FILE. Print. Check in Photoshop. 60/40/40/100.
I have an inkling that saving the file while having the box selected is what made InDesign "keep" the change. But I don't know for sure. Thought I'd give a little more insight and a possible workaround for the original poster.
Let me know if it helps!

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Best regards / Med venlig hilsen
Jacob Schäffer | Chief Developer
Grafikhuset
Paradis Allé 22, Ramløse
DK-3200 Helsinge, Denmark
Phone: +45 4439 4400
Email: [email protected]
Web: www.grafikhuset.net

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Follow-up:
One of my colleagues is working on a product feature that involves checkboxes (this is how I came across this issue in the first place). His checkboxes aren't contained within a form element whereas in my test page I described in my question when I removed the form from the page the issue didn't manifest.
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>Then I opened all 4 (including raw file) and the Raw, Adobe, and prophoto were identical, the remaining srgb pic was alot redder, like I had a red filter almost, just really warm
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Point blueLoc = new Point(640, 480); //etcEdited by: endasil on 14-Sep-2009 10:21 AM

Color change in PDF

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