Acrobat highlights fill areas of a form which is by default as purple in color. It can be switched off in Acrobat, through its following menu: Edit > Preference, choose forms tab and change the field highlight Color.
Thanks and Regards
Hi thank you. So that means that the colors are defined by Acrobat ? If my customer opens it, it doesnt matter which color i define, he always sees what his Acrobat Preferences are? Is that right?
Yes that is correct.