Color Blending is making your adsense match your content. Visitors have developed ad-blindness to adsense unless you make it seem part of the adsense content. Instead of having a border around the adsense, make sure it doesn't stand out too much on your adsense website.
If you website uses a lot of borders to separate content then maybe using a border for you ad will actually look better. If so then add a border. However most of the time having the adsense inside of content to where it looks like it is a part of the actual content is the best place to put it.
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Adsense Secret 1
