Non-honey bees

I recently ran a workshop for a group of schoolchildren. We talked about bees and drew them in a cartoon style. The kids had lots of questions, one of which really stuck in my mind. They wanted to know what colours bees could be. I was able to tell them that there are black, brown, red, white, yellow, orange, green and even blue bees. But what about pink? I can’t recall any pink bee species. Are there none, or I just don’t know them, or have forgotten about their existence? Please help me if you know the answer!