I happen to have 5 violet-leaning blues inked up at the moment, so I thought I would just show them together. Sailor Jentle Ultramarine, Private Reserve Tanzanite, Chesterfield Sapphire (Diamine Sapphire Blue, I presume), Montblanc Royal Blue, and Noodler's La Couleur Royale. In person I would say that the Diamine ink is very slightly darker and less violet than the Private Reserve and Sailor Inks. La Couleur Royale is, of course, the darkest and most violet.
Comparison of Some Purple-Leaning Blues
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