Color will have an impact on people's psychology, but what you said is white, yellow and blue. The "grade" of this kind of leaflet is too low to attract customers' attention, so many people just throw it away, and I'm afraid the effect is not good. I suggest you go to an advertising company to find a professional to design a small color page (half a paper size). Beautiful text, attractive content, grasp the customer psychology, and lock the target customer group! Plus beautiful pictures can make you stand out from many competitors, so why worry about big things? Small color pages are very cheap.