Poison Ivy's Green Skin

Hi. I was just wondering if anyone knows when/where Poison Ivy was first turned green? I was looking online and didn’t find a definitive answer.

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You mean the in-universe origin of the green skin, or the out-of-universe first appearance?

I can’t really help with out-of-universe because I’m colorblind and sufficiently pale greens and reds are a little tough to distinguish for me (which means I can’t quite tell when she turned green or if she was ever not green), but I can run down her various origin stories if you want the in-universe source.

I was wondering whether it was in a comic or cartoon that she was first green in and what it was? Was The New Batman Adventures cartoon the first to have her in a skin tone other than human? Was the 2nd series cartoon’s comic the first to turn her green?