ΔE 18.5, loose: different enough that you should pick on purpose. Bright Green Blue is a little darker, more saturated, cooler than Pallid Wych Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Bright Green Blue is a little darker, more saturated, cooler than Pallid Wych Flesh.
The same difference applies the other way round: Pallid Wych Flesh is a little 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 Pallid Wych Flesh on the colour wheel See Bright Green Blue on the colour wheel
All matches: Pallid Wych Flesh equivalents · Bright Green Blue equivalents