ΔE 11.5, fair: the same colour family, but not a straight swap. Noble Steed Brown is noticeably lighter than Thondia Brown.
Can I use Noble Steed Brown instead of Thondia Brown?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Noble Steed Brown is noticeably lighter than Thondia Brown.
Can I use Thondia Brown instead of Noble Steed Brown?
The same difference applies the other way round: Thondia Brown is noticeably darker.
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.