A well thought out painting job will make you look good to your customers. A company invests a lot of money in branding and marketing. Does your business space portray the brand the same way? Is the look consistent with the feel of the website and your other marketing materials?
Retail stores in particular use paint colour to showcase their products. This is not any different for restaurants, sports and concert venues as well as hotels. Customers know you care about them if your facility is clean and presentable.