justice and purity
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The symbolic representation of the element silver & its respective color has been derived from the science of Astrology & Occult.
As per astrology, silver represents the planet moon. Moon is indication of 'Peace & serenity. In addition to peace, it also indicates creativity & Love. Silver is a Cold color, which helps in releasing any pent up tension in the mind or body (un-necessary heat).
As per astrology, wearing silver rings or silver pendants (especially in the symbol of half moon) is recommended for persons, who are agitated or short-tempered by nature.
Hence, silver color represents peace, love & creativity.
In addition, one more point can added here, that is, the element silver has no side affect if worn (in form of a silver ring etc), i.e. silver can only bring about good.
Dorothy's red shoes did not represent anything. In the original novel, she had silver shoes (silver to represent magic). When they turned the novel into a film, they changed the shoes to red to take make them stand out more since the film was going to be in colour.
Yellow
The compounds that represent silver chloride is.... scroll down scroll down
There really aren't any colours to represent Heavy Metal music. Nonconformity has always been one major aspect of the Metal scene, and colour coding it is absolutely contrary to this.
silver
mercury is a grey silver colour.
Anger.
Blue
power and wealth
Silver Fish: is a small insect which has a silver colour on its body.
silver
iron