Forest Sprite vs Hexwraith Flame

How close are they?

ΔE 28.0, loose: different enough that you should pick on purpose. Hexwraith Flame is a little darker, much more muted, cooler than Forest Sprite.

Can I use Hexwraith Flame instead of Forest Sprite?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Hexwraith Flame is a little darker, much more muted, cooler than Forest Sprite.

Can I use Forest Sprite instead of Hexwraith Flame?

The same difference applies the other way round: Forest Sprite is a little lighter, much 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.