Messages you receive are always black text on a grey bubble. What part of this was confusing? As other have mentioned, you can tell if it's iMessage or not in

Messages you receive are always black text on a grey bubble. What part of this was confusing? As other have mentioned, you can tell if it's iMessage or not in a few different ways, the send button color, the "Text Message" or "iMessage" label interspersed in the conversation, etc, but if you want to talk about the color of the bubbles, that only applies to outgoing messages.