I ran into this web site that has a tool to analyze any other web site and makes a picture of it  like that of DNA tests.  Of course I had to get it for DotNetNuke.com, with the red theme, and it is below.  Notice that this is an uncertified copy and cannot be used for paternity cases.  By the way, the web site in question is: http://www.baekdal.com/web2dna/.  You may want to explore this site, the guy has a lot of interesting articles there.

DNN DNA:

It's actually a fairly decent concept that drives the DNA pattern. The following is a snip from their site.

The brightness of the lines is determined by the importance of the tags in terms of structure.

• H1 is brighter than H2, which is brighter than H3.
• TABLE is brighter than TR, which is brighter than TD tags.
• Images and flash elements appear as 70% white.
• New HTML tags like STRONG and EM is brighter than older ones like B and I
• UL, OL and DL is brighter than their LI, DT, DD
• DIV layout is brighter than table layout
• Basically a semantically rich site will appear brighter than one with messy old-style code.

You can also determine the richness of text on a site. A site the focuses on (text) content is one where the DNA patterns is large (filling many containers), but contains a lot of empty spaces between the lines (empty space is the individual words).