IJA #3 Hairanshoku (Grey Indigo) vs Eshin Grey

How close are they?

ΔE 10.1, fair: the same colour family, but not a straight swap. Eshin Grey is a little darker, more muted than IJA #3 Hairanshoku (Grey Indigo).

Can I use Eshin Grey instead of IJA #3 Hairanshoku (Grey Indigo)?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Eshin Grey is a little darker, more muted than IJA #3 Hairanshoku (Grey Indigo).

Can I use IJA #3 Hairanshoku (Grey Indigo) instead of Eshin Grey?

The same difference applies the other way round: IJA #3 Hairanshoku (Grey Indigo) is a little lighter, more saturated.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.