Why not to use some AdSense ads on your site to leverage on a good traffic that has been already generated to your page or pages? With AdSense assistance you can offset expenses you spend on building your traffic and SEO optimization.
Great resource for finding almost all answers on customization of the Google AdSense settings is in AdSense Help.
How do I customize the color of the ads on my website?
To generate ad code with the palette of your choice:
Log in to your account at https://www.google.com/adsense
Click the AdSense Setup tab and choose AdSense for content as the product
Choose an ad type and format.
In the Colors drop-down, choose from one of our pre-designed palettes. You can edit it by clicking the color boxes next to each ad element. Or, to rotate palettes, click ‘Use multiple palettes’, then select up to 4 color palettes by holding down the Control or Command key
Copy-and-paste the AdSense ad code into webpages
Source: Google AdSense Help