No images or graphics are permitted. Also no red and green color fonts for Christmas. I don't know about blending, now I am worried about that. People who add grapics or pics are going to receive at least a warning when Adsense team reviews the site. Me, I am trying to comply with all Adsense rules. Drop the pics and graphics. If you don't believe me, just email the Adsense team through your account. Fast enough you will learn the truth.