Color of your Ads:
This is one property of Ads that is fully customizable. You can easily customize the color of your Ads using the color palettes provided by Google; and there are more than 200 colors available. You can choose from several different colors that are available on the color palette (and 200 colors are enough for any website). You can choose colors for Border, Title, Text and URL. You can also set a background color for your Ads. As you select various options, you can see how the ad looks in the preview tool that is shown on the same page as the options; and you can accordingly make adjustments. The color combinations for the various parts of the Ad and for the background should match the color combinations used in the other parts of the website. To make the Ad blend with the website, you can use the background color of your webpage as the background color and the border color for your AdSense Ad. If you want to make the Ads stand-out, you can use contrasting colors for your Ads; however, this is generally not preferred unless you have other elements on the website that use similar colors too e.g. you can have the same background color and text color as the menu options. Once you have the right color combinations, you can save them as custom color palette which you can use later.
Similar color customization options are available for Google AdSense search results page too (as in, Google AdSense for search).