The bean that I planted is all Brown With white speckels
"It is really brown in person but the flash lightened it" , I also found itbto be cool so I planted it.
Inversed patterns happen. It is not that rare. In almost all cases the normal pattern comes back when you harvest the seeds from the plants that grew out of inversed seeds.
I once saved the inverted seeds from Borlotto Stregonta and planted a separate trellis of them. At harvest, almost of the seeds had the reversed colors.