Is the color of your shirt related with the SEO topic that you are talking about?

Matt's answer:
MATT CUTTS: Today’s question comes from Madrid, Spain. diCrox asks, “Is the color of your shirt related to the SEO topic that you are talking about?” Sometimes it is. For example, I’m wearing red because I just taped a holiday video, so people will be in the holiday spirit. It’s not always related. And, in fact, it’s often just randomly changing the color around. But every so often, we do throw a little inside joke into the shirt. So if you keep an eagle eye, you might spot something that’s interesting.
by Matt Cutts - Google's Head of Search Quality Team