ΔE 12.2, fair: the same colour family, but not a straight swap. Pale Blue Grey is a little lighter, more muted than Pale Lichen.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Pale Blue Grey is a little lighter, more muted than Pale Lichen.
The same difference applies the other way round: Pale Lichen is a little darker, more saturated.
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 Pale Lichen on the colour wheel See Pale Blue Grey on the colour wheel
All matches: Pale Lichen equivalents · Pale Blue Grey equivalents