What is he texted me out of the blue?

As an AI language model, I can provide you with some general information about the phrase "texted me out of the blue".

When someone texts you out of the blue, it means that they contact you unexpectedly, without any prior warning or prior communication. This expression is often used to express surprise or confusion when someone receives an unexpected message or text.

It is commonly used in the context of social media or mobile messaging apps, where people can easily contact each other at any time. Texting someone out of the blue can be seen as a way to reconnect or start a conversation, but it can also be seen as intrusive or unwanted if the person has not expressed interest in being contacted.

Overall, "texted me out of the blue" emphasizes the suddenness, surprise, and lack of prior communication of a message, making it a useful phrase for describing unexpected messages or interactions.