Hey everyone. I've been doing Adsense for some time, and it seems to me like changing up your colors on your ads is a vital part of maintaining a consistent CTR. One thing I would recommend is to using random colors using PHP. For the technically challenged though, just switch up your Adsense colors when you insert ads on your most recent content. Your CTR will stay up! If you like this tip, feel free to give me reputation. Thanks.
I have been using this (changing up the colors on my ads) for some time with decent results. Another nifty way is to use Adsense Background Images. In case you do, get it approved by Google and ensure that - the ads with Background images are clearly portrayed as ads, and clearly distinguished from the content.
Google changes their own ads colors from time to time. The best tip is to make changes and test the results.
You don't need PHP scripting (although if you are hard-core enough ... ). Google's Adsense setup does this for you. 1. Go to Adsense setup. 2. Choose Adsense for Content. 3. Where you'd get to choose the colours, or a pre-made palette, choose "Multiple Palettes". 4. Done!