The real blue is the color with which potter Benito Guerrero makes his fortune. When he no longer receives the color from Germany as a result of the Second World War, he and his family's existence are threatened. However, with the help of his inventive cousin Ruben, he manages to bring his real blue back onto the market.
| Actor | Role |
|---|---|
 Henry HübchenBenito | Benito |
 Marijam AgischewaLuisa | Luisa |
 Gojko MitićLorenzo | Lorenzo |
 Helga GöringEusebia | Eusebia |
 Kurt BöweNot listed | Not listed |
| PPeter KalischNot listed | Not listed |
 Ursula KarusseitNot listed | Not listed |
 Blanche KommerellNot listed | Not listed |
 Arno WyzniewskiNot listed | Not listed |
 Ute LuboschNot listed | Not listed |
| RRuth KommerellNot listed | Not listed |
 Werner DisselNot listed | Not listed |
 Thomas WolffNot listed | Not listed |
| FFernando GallardoNot listed | Not listed |
 Pedro HebenstreitNot listed | Not listed |
| HHorst HiemerNot listed | Not listed |
 Leon NiemczykNot listed | Not listed |
| TTeresa PolleNot listed | Not listed |
 Walfriede SchmittNot listed | Not listed |
 Steffie SpiraNot listed | Not listed |
 Gerd StaigerNot listed | Not listed |
| HHannes StelzerNot listed | Not listed |
 Klaus-Peter ThieleNot listed | Not listed |
 Gerry WolffNot listed | Not listed |