wondering about pimentos

I'm curious about how pimentos get their color. I found one mention of pimentos being dyed at this link. There is no mention of dye on the label. But I've found other foods sometimes fail to reveal their true ingredients as well. I started wondering because Lindsey is suddenly a mess again. Lots of yelling, trying to hit, and spit. It's all the usual stuff she does when dye exposed. I was pretty grumpy and worn out with it last night. Then it dawned on me. I made olive bites for the Superbowl and Lindsey munched on at least a dozen olives Sunday. She wanted more Monday. If there is dye in there it would sure explain a lot. So I'm wondering if anyone knows where pimentos get their color.