Roles and color “blue of confidence” and “green peace of mind” plays in the marketing?

Color roles in marketing field are various.
Each color gives particular image.
Orange as “familiar”, purple as “creative”, blue as “reliable”, and so on.
Companies should make logo and site according to images they want to send to customers.
Figure in this article shows company logos by main color.
There is a quick introduction about conversion rate. Don’t miss it.