Qreuz conducted a study of the most common colors used for call-to-action (CTA) buttons in the U.S. We chose 20 of the top 50 most-visited sites (with CTAs), as ranked by Alexa, as of May 14th, 2020.
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We found that blue is the most popular color for CTA buttons on U.S. sites, accounting for 40% of the sites in the research. In second place, we take a jump down to red and purple at 15%. Orange and white CTAs were used on 10% of the sites in the study. Finally, only 5% of the most popular sites in the U.S. used the colors yellow and black for their call-to-action buttons.