ΔE 11.0, fair: the same colour family, but not a straight swap. Light Turquoise is a little lighter, cooler than Thousand Sons Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Light Turquoise is a little lighter, cooler than Thousand Sons Blue.
The same difference applies the other way round: Thousand Sons Blue is a little darker, warmer.
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 Thousand Sons Blue on the colour wheel See Light Turquoise on the colour wheel
All matches: Thousand Sons Blue equivalents · Light Turquoise equivalents