"BP’s most recent claim on the colour extended to fuel, car service stations and take-away food services." Yes color isn't a Patent but color psychology means

"BP’s most recent claim on the colour extended to fuel, car service stations and take-away food services." Yes color isn't a Patent but color psychology means a company can gain unfair competitive advantage and abuse it to own the market e.g. yellow/red for food (association). Colors should not be patentable.