Pilot Iroshizuku inks are one of the favourites among fountain pen users and for good reason. If these are within your budget, they are great inks that behave well and have some interesting colours. Tsukiyo is no exception.
J. Herbin Perle Noire translates to black pearl and the ink colour reflects its name as it is a saturated and dark black. The ink also behaves fairly well and is on the wet side, making it a black ink that I quite enjoy using in my fountain pens.