To print a form in two colors, you may need to save it to two files: one for the data printed in black and one for the data printed in color.
You can export a form with color separation at any stage. If the form has Draft status, its image shows a Draft mark above the identifier. If the form has Published status, the identifier’s appearance depends on its type.
To export a form with color separation, select File → Export To → Image file with color separation…. The images are saved as TIFF files: the black-and-white file has the _bw postfix in its name, and the color file has the _color postfix.