Fire stick made my channels black and white

I am working off just an antenna for TV service, My son plugged in the fire stick from his fathers (that was originally plugged into that TV - before I moved out) and it has made all the regular/antenna channels black and white. Color is gone...

IF we are watching something off the fire stick - channels are in color...

HELP - what do I need to do to get it back to color.. I have tried the setting in the TV, fire stick and the antenna... Nothing is helping.

Thanks,

Sue