ΔE 14.4, fair: the same colour family, but not a straight swap. Orchid Light is noticeably lighter, cooler than Lavender.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Orchid Light is noticeably lighter, cooler than Lavender.
The same difference applies the other way round: Lavender is noticeably 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 Lavender on the colour wheel See Orchid Light on the colour wheel
All matches: Lavender equivalents · Orchid Light equivalents