IJN Mitsubishi Green vs Bright Green

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Bright Green is a little lighter, more muted than IJN Mitsubishi Green.

Can I use Bright Green instead of IJN Mitsubishi Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Bright Green is a little lighter, more muted than IJN Mitsubishi Green.

Can I use IJN Mitsubishi Green instead of Bright Green?

The same difference applies the other way round: IJN Mitsubishi Green is a little darker, 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.