ΔE 22.8, loose: different enough that you should pick on purpose. Lemon Green is noticeably darker, more saturated, cooler than Hexos Palesun.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Lemon Green is noticeably darker, more saturated, cooler than Hexos Palesun.
The same difference applies the other way round: Hexos Palesun is noticeably lighter, more muted, 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 Hexos Palesun on the colour wheel See Lemon Green on the colour wheel
All matches: Hexos Palesun equivalents · Lemon Green equivalents