The big difference is in the head stripes (Breeding & Color ID)
The brown keets will have a broad stripe down the middle and thin stripes on each side while the royal purple keets will have wavy or squiggly lines on the head. The backs of all the different varieties can vary. Some are boldly striped while others are more solid or somewhat mottled in color. What really matters is the head stripes and the overall tone of the coloring.
- img: Color of these two weird keets? - steve, 2016-10-04, 23:29
- Hard to tell - Barbara-NH, 2016-10-05, 00:55