I did go through some searching for the right color ink. After going through a sample pack of my selections from Goulet (an excellent and cost-effective way to do it), I bought a bottle of Pelikan Edelstein Amber, which did not look good on the page nor was it particularly well-behaved - a great disappointment. I then gave a couple of full-week tests to some others, with a number from Diamine working well. I discovered that many brown inks are both unappealing and have a red or purple tinge making them unsuitable for business use (or any other use, really). The color of Noodler's Walnut was most appealing, but it both bled and feathered, so was impractical for every-day use on copier paper and the like. However, a color that matched the pen and was both well-behaved and attractive was Noodler's Golden Brown. It has wonderful shading, and it seems to me that it can be used in business circumstances.