According to the german ammo manual available here a black projectile should be AP, black with upper yellow band should be APHE, both without self-destructive fuse.
An upper green band should be a marking for self destructive fuse.
The upper of the two-set pics looks to be a 20x80 MG FF piece, yellow color = HE. The other marking looks like either like green or blue, a green band would be self destructive fuse but the position should be just below the ammo cap and not so much down below. A blue band would indicate an incendiary component, maybe this is a HE-I shell
The lower of the two looks like a 20x82 MG 151 incendiary with glow-tracer and self destructive fuse. Blue = incendiary, upper green band = self desructive fuse, lower dark red band = Glow-tracer, probably from an aircraft to operate at night (light red would be tracer).
An upper green band should be a marking for self destructive fuse.
The upper of the two-set pics looks to be a 20x80 MG FF piece, yellow color = HE. The other marking looks like either like green or blue, a green band would be self destructive fuse but the position should be just below the ammo cap and not so much down below. A blue band would indicate an incendiary component, maybe this is a HE-I shell
The lower of the two looks like a 20x82 MG 151 incendiary with glow-tracer and self destructive fuse. Blue = incendiary, upper green band = self desructive fuse, lower dark red band = Glow-tracer, probably from an aircraft to operate at night (light red would be tracer).