If you are a Google AdSense publisher, you may notice steady decline in earnings as times goes on. This is because, regular visitors of your web site get used to your ads and they ignore them completely. This phenomenon is called as "Ad Blindness".
There is an easy way to solve this problem. Keep changing the color of ads regularly so that they look like fresh content. Google AdSense script allows publishers to specify multiple colors for links so that the colors can be rotated every time ads are displayed. For example if you want to rotate link color of your ads in Black, White and Blue you can replace "google_color_link" attribute in you AdSense code with the following code
google_color_link = ["FFFFFF","000000", "0000FF"];
Like this you can rotate colors for any color attribute in your Google AdSense code. Give it a try and enjoy this cool feature.