During the years several nice brown spotted cats have been born.

The brown colour could be from from a bit cold to deep warm brown, but as warmer the colour is the better.   It could be even more difficult to have clear round and dark spotties.  Spotted cats often show more markings with lines than spotties,often on on side of the body.  The spotted markings should be cleare and wide spread. The spotted shown when they are kittens would be kept as adult and would not be darker if they are unclear or pale.