ΔE 10.3, fair: the same colour family, but not a straight swap. Pale Blue is a little lighter, more saturated than Iron Man.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Pale Blue is a little lighter, more saturated than Iron Man.
The same difference applies the other way round: Iron Man is a little darker, more muted.
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 Iron Man on the colour wheel See Pale Blue on the colour wheel
All matches: Iron Man equivalents · Pale Blue equivalents