Most mirrors are clear glass. The backing is called "silvering" and silver isn't really what you would consider a color. But it seems you can have a mirror almost any color you want. check http://www.mirrorlink.org/basics/designing/colors.htm

Mirrors are every colour at once.

I say a mirror is the colour of God.

Silver. Or grey.

Blue, actually. Ever look at a frameless mirror from the side?

My scrying mirror is black.

hey ppl-i think the simplest answer is the colour of the mirror is whatever its reflecting!..when its not reflecting anything its immposible to tell unless u go to a mirror factory and see how its made...

Mirrors are unexplainable (sorry to dissapoint). Well, no one has been able to explain them yet anyway. This is because they are what we like to call "impossible". They are 2 colours at once...1) the colour of the image that it is reflecting, and 2) silver. Something cannot be 2 colours at once. Please don't be naive about that statment and come back telling me that your jumper is multi-coloured...yes it may be, but if you break that down into bits of cotton, and then break that down into a bit of that bit of cotton (and you can go on and on until you reach atoms) then you will realise that an atom cannot be 2 colours at once. You may also say to me well what about those cars that change colour when you look at them from differnt angles. Well that gives the image that it changes colour but it doesn't, it is just that when you look at it from one angle you can not see certain atoms and from another angle you can, just like one side a piece of paper can be blue and one side can be red. Anyway...mirrors do exactly what i have just said cannot happen. As I said before, they are "impossible" in our universe because they break the laws of physics. But how can anything exsist in our universe if it is truely impossible? The answer to that question is...it can't. But mirrors do exist in our universe...they are a physical thing...they are made up of atoms...we can touch and feel them...so they are not impossible. This why mirrors are so increderbly confusing. There is something very strange about mirrors that cannot be explained with the knowledge we have at the moment...they are a contradiction. The next thing you need to question is "impossibility" and whether impossibility is possible.

Every time I go to look in one, I'm blinded by the beauty queen I see looking back at me. ;-) (only kiddin)

1) I only consider mirrors as light reflectors. Here some other uses: http://en.wikipedia.org/wiki/Mirror_%28disambiguation%29 I also do not consider here the mirror as object (which could have a frame or a backside of various colors, but only the reflective surface. Mirrors usually have changing colors, which depend on the mirror itself, its environment and the characteristics of the observer. 2) "The color of an object depends on both the physics of the object in its environment and the characteristics of the perceiving eye and brain. Physically, objects can be said to have the color of the light leaving their surfaces, which normally depends on the spectrum of that light and of the incident illumination, as well as potentially on the angles of illumination and viewing. Some objects not only reflect light, but also transmit light or emit light themselves (see below), which contribute to the color also. And a viewer's perception of the object's color depends not only on the spectrum of the light leaving its surface, but also on a host of contextual cues, so that the color tends to be perceived as relatively constant: that is, relatively independent of the lighting spectrum, viewing angle, etc. This effect is known as color constancy." "Light arriving at an opaque surface is either reflected "specularly" (that is, in the manner of a mirror), scattered (that is, reflected with diffuse scattering), or absorbed – or some combination of these." Source and further information: http://en.wikipedia.org/wiki/Color 3) "A mirror is an object with a surface that has good specular reflection; that is, it is smooth enough to form an image. The most familiar type of mirror is the plane mirror, which has a flat surface. Curved mirrors are also used, to produce magnified or demagnified images or focus light or simply distort the reflected image. Mirrors are most commonly used for personal grooming, decoration, and architecture. Mirrors are also used in scientific apparatus such as telescopes and lasers, cameras, and industrial machinery. Most mirrors are designed for visible light, however, mirrors designed for other wavelengths of electromagnetic radiation are also used, especially in optical instruments." Source and further information: http://en.wikipedia.org/wiki/Mirror Further information: http://en.wikipedia.org/wiki/Specular_reflection 4) "A perfect mirror is a theoretical mirror that reflects light (and electromagnetic radiation in general) perfectly, and doesn't transmit it. Domestic mirrors are not perfect mirrors as they absorb a significant portion of the light which falls on them. Dielectric mirrors are glass or other substrates on which one or more layers of dielectric material are deposited, to form an optical coating. A very complex dielectric mirror can reflect up to 99.999% of the light incident upon it, for a narrow range of wavelengths and angles. A simpler mirror may reflect 99.9% of the light, but may cover a broader range of wavelengths. Almost any dielectric material can act as a perfect mirror through total internal reflection. This effect only occurs at shallow angles, however, and only for light inside the material. The effect happens when light tries to go from a medium with a higher index of refraction to one with a lower value (like air). A new type of "perfect mirror", developed in 1998 by researchers at MIT, is a hybrid made of thin films of metals and dielectrics. These unusual mirrors are very efficient reflectors over a broad range of angles and wavelengths, and are insensitive to polarization." Source and further information: http://en.wikipedia.org/wiki/Perfect_mirror 5) As a conclusion, the color of a mirror, like that of any object, has various components. The particularity of mirrors is that they have a good specular reflection. In this case, a great part of the color of the mirror is determined through the image which it forms. As usual mirrors are not perfect, another smaller part will be the result of this imperfection. As the color mainly comes from the image, it can be variable and will also depend, among others, of the characteristics of the observer such as their position.