Praise be to Allah.
There is nothing wrong with using colours in marketing. There are colours that people like, or that calm their nerves, and there are colours that people are put off by.
There are some studies, the authenticity of which we have not verified, which speak of colours and their psychological effect in the manner that you have described, such as the suggestion that the colour orange gives a sense of ease and warmth, and that the colour red is provocative and stirs up anger.
Whatever the case, if it is proven by experience that people are inclined towards a certain colour, then choosing this colour for marketing purposes has nothing to do with divination, because divination is claiming to have knowledge of the unseen and to foretell future events.
In al-Mawsoo‘ah al-Fiqhiyyah (14/52) it says: Divination is claiming to speak about events in the future and claims to know secret things. End quote.
And Allah knows best.