Target

I visited the Target web site and The first thing that stood out was the deliberate color use of white and red.  The term white space, and the good use of it with contrasting colors or even large gaps to emphasize a picture or image.  Target uses dark colors that make each topic stand out, which is nice because it gives the site a certain equilibrium.  Their topics are clear and black, stand out and are organized logically (probably in order of frequency). 
Target's next marketing move was to use red for campaign items or action items.  They use the color red like M. Night Shamalyn in the Sixth Sense. You just see it on the screen without realizing the connection each red item has to the other. The shopping cart, coupons and the red card, all listed in red. You know what else?? In all the cases they get demographic information from you. Coupons an email account, shopping cart they get your name, address, phone, etc... This site is brilliant because it gives information from you willingly. 
The last thing Target does is repeat subject matter when appropriate.  for instance the Baby section is in black and then featured a quarter of an inch down in large font. Then a special is listed for a toddlers toy.  Now that makes three different ways to link to the same department on the landing page.  It's a great way to get people deeper into your site (along with the search bar and store finder) and keep them looking.