You can relax a little on metal finish consistency and go with a general concept. A general concept, like - brushed nickel in the wet areas and bronze in the rest of the house. From there I think it is best to fine tune the hardware relating to other metals like light fixtures, window hardware, railings, etc. I do this same idea with light fixtures but allow much more latitude to decorative fixtures. This allows a more personal touch and comfort to the house. You can also buy hardware plates and knobs that differ on either side of a door to change finishes from room to room.
Uniformity of all hardware is that one metal should be the same or consistent in color. The public rooms: living room, dining room, front halls, and bedroom halls should be one finish, and theme. Then the bathrooms, and private rooms can pick up another theme. So, uniform the main spaces and tie them together, and one can do separate themes, Light fixtures, switches, door knobs and faucets inside rooms, and maybe bathrooms can be totally different.
So does that mean you can just add whatever wherever you want? Well, not exactly -
I do still think there are areas where consistency needs to be maintained. For example, if you’re going to use brushed nickel door knobs, then be sure your hinges are also brushed nickel. And if you’re using brushed nickel hardware on one door, then use brushed nickel on all of your doors. If you start mixing and matching hardware on your doors, it’ll end up looking like you purchased whatever hardware you could find in the clearance bins.
But I do think it’s absolutely, perfectly fine to use brushed nickel door hardware and oil-rubbed bronze lights. In fact, I think the two metals compliment each other quite nicely.
Stick with Just Two
When mixing different metal finishes in the same room, most designers feel that it is best to stick with just two metal finishes instead of three or more. Of coarse there are some homes that break this rule beautifully, but the rule works in most cases. The more metal finishes you have in each room, the harder it is to make them feel cohesive.
Do: Choose a Dominant Metal
Choose a metal you love to be the most prominent in your space, then select one or two metal accents to complete the look. Multiples When introducing a new metal finish when decorating your room, do not use it in only one place. Try to repeat the metal element in at least one other place in the room, unless it is a large focal point such as a copper tub or gourmet range.
Door Knobs All interior door knob metal finishes look best when they are the same color throughout the house for consistency. Kitchen Appliances If using metal finish kitchen appliances, try to use the same metal finish throughout the kitchen. Plumbing Fixtures Plumbing fixtures can be different metal finishes in different rooms in your house, however they should be the same metal finish as each other in the same room.
Don’t: Be Afraid of Mixing Warm and Cool Tones
Warm metals (like gold and brass) come off as a rich pop of color and texture when placed with cool metals like silver and chrome. Many people think that matching your finishes is the best way to coordinate your home or kitchen, but in reality this often creates a monochromatic and less interesting look.
Do: Consider Your Color Scheme
Although I encourage you to mix and match, it is very important to consider your color palette when selecting your metal tones. Typically, you should use warm metals (like gold, brass, and copper) with warm hues (like reds, browns, and yellows) and cool metals (such as chrome and silver) with cool hues (such as blue, green, and violet). It is neutral rooms, however, that beg for metallic accents in order to add warmth, texture, and color. If you’re using gray tones, a gold mirror can make a room come to life. Use your metals to even out your room temperature.
Don’t: Disregard Texture
When using metals, don’t forget to consider texture. It can make all of the different in a space with mixed metals. Combine matte, polished, and hammered finishes to create a rich atmosphere.
Do: Use Natural Iron
As a Neutral Iron is the neutral of the metallic world. It is a modern industrial touch that adds a dark element to a palette that needs to be grounded or toned down. It won’t clash with other metal tones, and it also helps warmer metals, such as gold, gain a stronger pop of color.