Rank insignia of the German Wehrmacht until 1945; generl officer ranks Heer (army) here:
figure 1 to 6 shoulder straps (basic color to all service branches – deep red).
1  – Generalfeldmarschall OF-10 (1942 – 1945)
2  – Generalfeldmarschall OF-10 (before 1942)
3  – Generaloberst OF-9
4  – General der Waffengattung OF-8
5  – Generalleutnant OF-7
6  – Generalmajor OF-6.
(in German) (2013)  Die deutsche Wehrmacht: Dienstgrade und Waffenfarben des Heeres 1939-1945, Czech Republic:  Motorbuch, pp. 14, 19,34  ISBN:  978-3613036017.