I have a bug. When my witch first started out, I took her to get a tan and swim in the ocean. She swam through a cold spot and turned blue. Every since then, every sim day, she turns blue and it says she swam through a cold spot! It really freaked me out first time she drank fill needs potion, she turned blue! I thought the potion turned her blue! Haha. I've gotten used to it. She turns blue for a few minutes, her knees shake and then it's over.
Maybe it's because when she first started life, she was a red headed man. My husband told me how silly he looked and that he should have been a woman. So I changed him/her. Then went to the ocean.... Who knows. Don't let your witches swim in the ocean. lol