ΔE 11.9, fair: the same colour family, but not a straight swap. Indigo is a little lighter, more saturated than Terrestrial Titan.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Indigo is a little lighter, more saturated than Terrestrial Titan.
The same difference applies the other way round: Terrestrial Titan is a little darker, more muted.
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.
See Terrestrial Titan on the colour wheel See Indigo on the colour wheel
All matches: Terrestrial Titan equivalents · Indigo equivalents