Why Drupal is blue?

Hmmmm, interesting take there. Let's research the actuality based on Dries' own words, shall we?

.... with reference to dorp/drop/drupal = http://buytaert.net/state-of-drupal-presentation-march-2009

Dries takes the stage around 2 mins 17 seconds and talks about the story of how "Drupal" came to be shortly thereafter. Which is the same explaination found here: History of Drupal for those who prefer to read rather than watch a vid.

I don't claim to be an expert on the dutch language. I can only take Dries' own words as the definition. I tend to put stock in his explaination because he is the original creator of drop.org and what eventually became known as drupal. What you are stating (even if noah materializes) seems to go against what Dries himself states in multiple videos, interviews and documentation found on d.o and on the internet in total.

Quoted for posterity from the History of Drupal documentation page:

While looking for a suitable domain name, Dries settled for 'drop.org' after he made a typo to see if the the name 'dorp.org' was still available. Dorp is the Dutch word for 'village', which was considered a fitting name for the small community.

Once drop.org was established on the Web, its audience changed as the members began talking about new web technologies, such as moderation, syndication, rating, and distributed authentication. Drop.org slowly turned into a personal experimentation environment, driven by the discussions and flow of ideas. The discussions about these web technologies were tried out on drop.org itself as new additions to the software running the site.

It was only later, in January 2001, that Dries decided to release the software behind drop.org as "Drupal." The purpose was to enable others to use and extend the experimentation platform so that more people could explore new paths for development. The name Drupal, pronounced "droo-puhl," derives from the English pronunciation of the Dutch word "druppel," which means "drop."