ΔE 10.9, fair: the same colour family, but not a straight swap. Dechala Lilac is noticeably lighter than Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dechala Lilac is noticeably lighter than Purple.
The same difference applies the other way round: Purple 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.
See Purple on the colour wheel See Dechala Lilac on the colour wheel
All matches: Purple equivalents · Dechala Lilac equivalents