Which combinations give an intense blue precipitate immediately (air excluded) in the cation tests?

Fe(II) with hexacyanoferrate(III) gives Turnbull's blue, and Fe(III) with hexacyanoferrate(II) gives Prussian blue (both $\mathrm{Fe}{}^{\mathrm{II}}$-CN-$\mathrm{Fe}{}^{\mathrm{III}}$ mixed-valence solids). Fe(III) with $\mathrm{K}{}_3[\mathrm{Fe}(\mathrm{CN}){}_6]$ only gives a brown-green solution, and Fe(II) with $\mathrm{K}{}_4[\mathrm{Fe}(\mathrm{CN}){}_6]$ gives a white precipitate that turns blue only on air oxidation.