Purple when I was trimming the leaves back from my pregnant onion plant, it gave me the worst rash I had ever experience. My skin literally felt like it was on fire. I washed my hands and arms several times, put medicated powder on, took some Benadryl and all of that didn't help. I had to wait 3 or 4 days for the rash to finally go away. Now every time I see that plant, I'm more cautious around it lol