Ink color is a matter of preference so I don't mean to insult anyone's preferred ink but there are three inks I have right now that I just don't like: Pelikan Royal Blue, Pelikan Brown, and Lamy Green. I find all of them a bit too pale. I'd like to improve them so I don't dump them in the sink So far, I've tried adding a little Waterman black to a small quantity of each. It seems to work all right for the Lamy green. But the Pelikan brown either gets too dark and Pelikan Royal Blue looks like poor variety of blue-black. If any of you have mixed these inks in some interesting way, please do share your recipe.