ΔE 15.0, fair: the same colour family, but not a straight swap. Dechala Lilac is noticeably darker, more saturated, warmer than Light Lavender.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Dechala Lilac is noticeably darker, more saturated, warmer than Light Lavender.
The same difference applies the other way round: Light Lavender is noticeably lighter, more muted, cooler.
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 Light Lavender on the colour wheel See Dechala Lilac on the colour wheel
All matches: Light Lavender equivalents · Dechala Lilac equivalents