All other permanganates, as well as permanganic acid itself, give solutions of the same color.
permanganic acid is only known in solution or in a state of combination.
Manganese forms two unstable acids, namely, manganic acid and permanganic acid.
permanganic acid per·man·gan·ic acid (pûr'mān-gān'ĭk, -māng-)
An unstable inorganic acid existing only in dilute solution. Its purple aqueous solution is used as an oxidizing agent.