My website has adsense, but i think the colours of the ads could be better for ctr. I think i have to change colours but don't know which colours are better for the site who can help me. site: http://www.html-site.nl It's mainly about the colours on the left ads and the colours of the ads in the articles (under the title).
I suggest you change the background to white color. The orange color also isn't good. I suggest you also change it.