No, Formscentral does not support calculation logic for field value or property, such as color.
I suggest you can add or vote new idea from here:
If you need to add a new idea, please go to http://forums.adobe.com/community/formscentral and click on "Submit Feature Request" link under Resources section.
If you try to modify the PDF in Acrobat it will complain. You first need to 'File > Save a Copy...', save the copy under a different name than the current form name, open the saved copy and modify it. When you are done with your modifications you will need to add the Reader Extension rights back ('File > Save as Other... > Reader Extended PDF > Enable More Tools (includes form fill-in & save)...')
Make sure you test your form submission after you modifications. You have to be careful as certain operations will break the FormsCentral workflow. Changing the field's border color and adding some calculations to existing fields should work.
Hope this helps
Thank you for comment. I understood that I can't set script by Formscentral.
I appreciate the detailed description.
I'll try your way.
I will report the results tomorrow.
I had the following problems on the way, so I created new PDF file and copy and paste from old PDF.
FormsCentral could not import the PDF document because it has already been distributed by FormsCentral.
>Pengpeng Sun & Gen
I was able to solve the problem by your advice.
After you modifications in Acrobat you do not want to import that PDF in FormsCentral. You should go to the FormsCentral that was used to generate that fillable PDF. The data submitted from your modified PDF should still submit in the same FormsCentral form as before your modifications.
As of now you can't reimport a FormsCentral PDF form back into FormsCentral. This is something we are fixing but even after we fix that this is not what you want to do in this case anyway (unless you did modifications in the PDF that break the FormsCentral submission).