Tonmeister step by step unlocks your musical ear and helps you gain perfect pitch. Most people will tell you this is something you must be born with, that there's a "perfect pitch gene" you either have or you don't. Or they'll say you must develop it at a very young age.
Like learning a language, this may make things easier. But play a middle C and a C one octave up. Then play another random tone. If you can hear that the Cs "sound the same" and the other tone "sounds different", you too can fully develop your perfect pitch color hearing!