Some marketers try to apply psychological principles to their marketing.

If you looked into it, you'd find that was behind some of the stupidest, most absurd marketing you've ever seen.

Interestingly this seems to be most used in the so-called "vice" industries - cigarettes, gambling, porn and hard liquor advertising.

I recall seeing a billboard advertising a brand of cigarettes that didn't have the name nor a picture of the package or logo of the brand on it. It showed an idyllic wintery scene. The colors matched the colors of the brand.

I guess you were supposed to look at the billboard and assocate their brand colors with peace and calm or something and therefore buy the brand the next time you went to buy smokes.

Right.

Don't try to use psychology in marketing. It doesn't work.