This scan is a bit off. It should be slightly lighter, brighter and a bit more yellow, but this was as close as I could get. This ink has fair to good shading, which also isn't shown well in this scan. However, putting another hour into iPhotoing it probably won't help.
This cartridge of Pilot Parallel Pen Mixable Color Orange behaved well in my 6mm Parallel Pen with good flow, no skipping, and no drying out even in this huge nib. I'm not crazy about the ball and washer cartridge design as it's hard to reseat once removed, but it works really well if you just leave it in a single pen.