De Atramentis Singapore is a custom ink produced by De Atramentis for Fook Hing Trading. There has been two different colours, one being a dark blue and the other this particular ink. I’ve not seen the dark blue so I can’t say how it differs from this ink.
De Atramentis Singapore is a bright blue ink with green undertones. It is sort of teal-ish but not quite dark enough. It is a nice in between colour. De Atramentis Singapore shades nicely. Overall, it is an enjoyable and fun ink.