There are many kitchen appliances these days that are metallic (steel, chrome, etc.) colored. Not every color gamma is good with such devices. Usually people choose a gamma and try to contrast it with all devices, but in my opinion this is not the best way to go. Japanese kitchen maker Tayo Kitchen, who has fantastic dark kitchen designs under their belt, has a much better idea. The Porto collection is a great combination of gray, white, black and metallic cabinets and furniture that complement each other perfectly. Your display cabinets are a great example of kitchen design to draw inspiration from.