Google’s a company that trusts numbers over instinct or aesthetics. As you might expect with a company that touts its algorithm as the secret to its success, optimization of results is the Big G’s bread and butter.

It should then come as no surprise that Google’s prime real estate, its search results Sponsored Results, should be open to optimization, as well. Most of us recognize these results, at least the ones at the top, as being shaded in a pale blue. But recently, we found a couple of differently-colored variants – one pinkish, one peachy – that suggests that Google means it when they suggest that publishers test, test and test again their AdSense ad unit background colors, since they can have an impact on clickthrough.

YieldBuild automatically tests background color on text ads (either AdSense or Premium Text Ad Program), but if you’re flying solo, then you’ll want to test and measure, and test and measure.