On my (dutch) page about travelinsurance, I just changed the most important banner from white color to yellow and guess what already more clicks then yesterday... Sometimes ads can be too well blended I guess??
Interesting. Initially I didn't blend in my ads but had banner colours which matched the rest of the site. That didn't work as well as it does now, where I just have a simple CSS border that's a very faint grey colour. I guess it depends on the kind of visitors a site gets too.
hmm yes it sometimes just work if you experiment...when I really have some time, I will experiment with my older sites to see if other colours will do the trick too (for them it may be that returning visitors are adblind for the old colours)