I've been looking for the perfect blue. Nathan Tardif created one for the Commonwealth Pen Show in 2016 called North Star Liberator by Noodlers but that ink is not available. My quest over the past several months has found two inks, Noodler's Monkey Hanger Blue (had to order from England) which is just a tad lighter and PILOT IROSHIZUKU KON-PEKI INK which is just a touch darker. I'm settling on Kon-Peki for my standard blue ink. If you haven't figured it out, I love blue! Thanks Anderson Pens for your 3 ml samples. Most other supplier's offer 2 ml samples.