If you're an iPhone owner, you may want to use good judgment before responding to any out-of-the-blue text messages in the near future.

ENGADGET: iPhone reportedly vulnerable to text message spoofing flaw

In order to shorten the learning curve, Facebook is working on a way to better educate users how to use Home through a series of blue instructional text bubbles (affectionately called Blues Clues) that explain Home's features when you first try to access them.

ENGADGET: Facebook Home's immediate future: buddy lists, an app dock, folders and more

Users of the new iOS5 also may notice that by using iMessage, their text messages are blue, whereas going through a carrier, their texts are green.

FORBES: Apple: More than The New iPad

The blue book, a legal citation reference text, marks a person as a lawyer, just like the redweld.

FORBES: My Weird Hobby: Matchmaking Lawyers

The site features tiny text and old-fashioned blue hyperlinks.

WSJ: Crovitz: Toward Rivals, It's Craigslitigious

FakeSecSuite, appears as a red, green, blue and yellow shield icon and drops a Trojan that steals incoming text messages and device information, shipping them off to a remote server.

MSN: Fake Android Anti-Virus Records Calls, Steals Info

Marked by a patently obvious blue button, the new addition serves up relevant prior art results by using key phrases from a patent's text and putting them together in a search query.

ENGADGET: Google Patents search gets upgrade, now filled with prior art and European patent goodness