Color decisions can influence both direct messages and secondary brand values and attributes in any communication. Color should be carefully selected to align with the key message and emotions being conveyed in a piece.
However, saying that one color converts better than another is an oversimplification. There is no universal best color. What works on one site, doesn’t necessarily work on another. Visual hierarchy matters and making your call to actions stand out matters.
E.g.
So “green vs red” is not so much about the color, but “does the important stuff stand out enough” and if not, how can we improve the situation.
citation: Wikipedia
https://blog.kissmetrics.com/color-psychology/?wide=1
https://conversionxl.com/which-color-converts-the-best/#