I bought Ama-Iro to see how much lighter it was compared to Kon-Peki. Both are blue, both are saturated, with Ama-Iro being lighter in tone than Kon-Peki. I would say that Ama-Iro is a cerulean or a manganese blue, whereas Kon-Peki is a blue-leaning turquoise. I use Ama-Iro for corrections and markup as it offers nice contrast against black text, and use Kon-Peki for daily writing and note taking.
Even though Ama-Iro is slightly greener than Diamine Florida Blue and Mediterranean Blue, Sailor Kobe Harbor Sky, Bungubox Hatsuyume Aofuji and Kobe #42 Rokko Island Blue, it is still blue.
Ama-Iro is still bluer and lighter than JH Bleu Pervenche, Waterman Inspired Blue, Edelstein Topaz, RO Bondi Blue and Australian Sky Blue, Diamine Aqua Blue, MB Unicef, Taccia Sora, some Kobe blues and the Italian-branded turquoises.
There is something pink going on in normal writing with average to generous flowing pens, but I’ve been unable to define it: it’s either a faint sheen, a pale halo or an outline. It’s quite interesting. I’ve observed a number of similarly coloured inks behave in the same way, so I wonder if it’s a property common to that colour family.
In a sea of similar and comparable blues to choose from, it all comes down to an ink’s characteristic and personal preference; I like an ink with good flow and saturation, that is vibrant without being eye-searing, that doesn’t feel thin under the nib and doesn’t feather on the papers on which I usually write. Ama-Iro gets my vote!