Thanks for such a great job at showing one of my favorite inks! Honestly, I didn't take Diamine that seriously until I got this one, mainly because all their inks I had tried up to that point - some of their most popular ones - were oversaturated and unsubtle for my tastes.
Not sure if it is a violet or a grey. It doesn't really matter - it's something in between - many of the best inks live in the margins. My writing with it tends to be noticeably more violet than yours, even with the Japanese Fs I tend to use, but perhaps it is because those pens tend to be dryish. Or maybe it could the paper and/or atmospheric differences. Or 'mojo'?
Right and, moreover, Haydn had much stronger ties to London and, moreover2, neither Mozart nor Beethoven are in the same league as Haydn - not even close! (Yep, you read correctly. 😲) I suppose it's much better he be left out than some inappropriate color be associated with him.
BTW, I would pick an earthy brown since he was the salt of the earth as both a person and composer. Actually, I think the color on the wall in this portrait of him would be a perfect fit.