AdSense Custom Search Styles
Complete How-to Guide for AdSense Custom Search Ad Styles

UPDATE: As of March 9th 2020, Custom Search Ads will transition from styling the JavaScript tag on the client side to using the Custom Search styling controls in the AdSense interface. If you’re already using the AdSense Custom Search styling controls, this will not impact you. https://support.google.com/adsense/answer/9724088 About Custom Search Ads Custom Search Ads is