[dennisnedry]

It's an SMS, not specific to iMessage.

[Reedx]

Then the messages would be green. I'm curious about this as well (unless they're just photoshopped).

When I was experimenting with Twilio that was the only aspect that was a little disappointing. I wanted blue messages. :)

[firloop]

Pretty sure they're just photoshopped and they don't use iMessage in reality. The font/kerning/size/alignment looks off from here.

[asadm]

the blue message bubble is iMessage specific.

[iancarroll]

It's evidently photoshopped, based on the message bubble padding. Definitely just an error.

[tbrock]

Or on purpose since since the blue messages are meant to look better with the UI so that you prefer using iMessage when possible.