Green URL and other design ideas

[Play_Bach]

The color scheme possibilities (and the psychology that goes along with that) for the ad layouts fascinate me.

Like many here, I've experimented with lots of different ad layouts/palettes in search for a combination that works best for a particular page.

What is interesting to me is that Google, Yahoo! and MSN all use for their default palette (with slight variation in the color hues, and against a white background) the combo:

blue title
black text
green URL

The blue link color for the title is obvious, but why green for the URL? Aside from it offering a contrast in color, maybe it's because green means "GO!"

[Clark]

Yes, that's classic marketing psychology. Red means stop. They've done countless studies. Similar example, my Marketing teacher in college told us that no matter what else is done, put a picture at the end of a tv ad of someone calling the number that you drill into their heads and the number of calls you'll get go up significantly. Each and every time.