RAL color or solid color is commonly used on hollow metal door. It looks clear and simple especially for school, hospital, education center etc. Here there is another option for the surface treatment to metal door. That is wood grain finish metal door.
Wood grain metal door is one of our main products at Asico. You will choose any wood grain color like oak, walnut, mahogany, cherry, beech etc. It depends on the surrounding environment. To match the color of furniture is a good way to make the entire decoration more elegant and harmonious. Here the below is one picture of metal door with dark walnut grain finishing.