@iniadman12 – you could check yourself, if you implement the Flattener script for Acrobat Pro I mentioned in answer #6. After flattening the form fields you have access to the color numbers and the applied color space through the OutputPreview in Acrobat Pro.
My experience with form fields in InDesign says yes, all form fields are converted to sRGB.
However, there is a slight chance to generate form fields with Acrobat Pro that are in Black only.
But for that, I think you need a Mac version of Acrobat Pro.
I'd ask the specifics for that in the Adobe Acrobat Forms forum.
See especially the following thread (no solution yet):
http://forums.adobe.com/message/5378929#5378929
Uwe
