Spectral Purple vs Hexed Lichen

How close are they?

ΔE 21.6, loose: different enough that you should pick on purpose. Hexed Lichen is noticeably darker, more muted, cooler than Spectral Purple.

Can I use Hexed Lichen instead of Spectral Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Hexed Lichen is noticeably darker, more muted, cooler than Spectral Purple.

Can I use Spectral Purple instead of Hexed Lichen?

The same difference applies the other way round: Spectral Purple is noticeably lighter, more saturated, 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.