Weird color issues in certain games

[NATE LYNOTT]

Hi I am new to Atari and recently picked up a 2600Jr and some games. Some of the games have very weird color issues even after I cleaned them. most noticeably on Pitfall and Donkey Kong.In Pitfall almost everything is pink purple or green and in donkey Kong everything that is supposed to be blue is brown. Cosmic Ark,Yars' Revenge and Adventure have color issues as well. but weirdly enough Space Invaders and Solar fox seem to display fine.I don't know if it is and issue with the games or my system so if you know anything about this issue or have any suggestions on how to fix it please tell. I attached images of my Pitfall and Donkey Kong.

Edited January 14, 2018 by NATE LYNOTT

[atari181]

No pics are attached. Are you sure the games are NTSC OR PAL, whichever region code you are in?

[NATE LYNOTT]

Sorry I am new to atariage I added pics but it flipped them for some reason I am in NTSC by the way

[atari181]

Are you sure the carts are NTSC, a PAL cart will have off colors when played in NTSC land.

[NATE LYNOTT]

I am not sure how can I check if a cart it is NTSC or PAL?

[NATE LYNOTT]

I found out what the problem was I guess the person who had this Atari 2600 before me messed with the color pot on the bottom because I turned it a bit and the color is back to normal for all my games.