ΔE 14.1, fair: the same colour family, but not a straight swap. Opal Skin is a little lighter, more muted than Radome Tan FS 33613.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Opal Skin is a little lighter, more muted than Radome Tan FS 33613.
The same difference applies the other way round: Radome Tan FS 33613 is a little darker, more saturated.
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 Radome Tan FS 33613 on the colour wheel See Opal Skin on the colour wheel
All matches: Radome Tan FS 33613 equivalents · Opal Skin equivalents