Metallic colors are ones that appear like shiny, polished metal.
A metallic cannot be reproduced by a simple solid color because the shine effect is due to the material’s brightness varying with the surface angle to the light source.
In addition, there is no mechanism for showing metallic or fluorescent colors on a computer without resorting to rendering software that simulates the action of light on a shiny surface. Consequently, in art and in heraldry, metallic paints that glitters like real metal are usually employed.
For example, to create a painting that gave the impression of gold appearing in the painting, a metallic paint that glitters in an approximation of real gold would be used; a solid color does not aesthetically “read” as gold. Especially in sacral art in Christian churches, real gold (as gold leaf) was used for rendering gold in paintings, e.g. for the halo of saints. Gold can also be woven into sheets of silk to give an East Asian traditional look. More recent art styles, for example, art nouveau, also used metallic, shining gold. However, the metallic finish of such paints was added using fine aluminum powder and pigment rather than actual gold.
The use of metallic colors is not limited to those colors that approximate the appearance of actual metals. In some instances, it has been noted, “beetles with bright metallic colors are made up into tie pins and cuff links”. One popular modern use of metallic colors is for automobiles, which use metallic paint to achieve a particular shine. Such colors “are made from a combination of different pigments and aluminum flakes that have different weights and particle sizes”. Crayon-maker Crayola has manufactured several lines of “metallic” products, including Metallic FX crayons, and metallic colored pencils, which have flecks of sparkles to achieve the metallic effect.
Metallic paints have mostly aluminum flakes. The reflection of light on these flakes gives them a shiny or glossy appearance. Usually, a clear coat (a lacquer layer) is applied on top of it during painting.
Metallics glitter and shimmer and shine…all the time : )
