Color Magic

Color Magic (色の魔法, Iro no Mahō) is a Caster Magic that revolves around the use of colors.

Description
Color Magic, as the name implies, revolves around the use of colors. However, each practitioner of Color Magic can only use one color, which is decided based on their personality and history. Also only one mage can use a color, so no two mages use the exact same color.

When using spells, the caster must first know their color (the means of finding out differs between mages), then the caster must give the color shape. The shape is dependent on the mage, and the shape can be altered as needed. Along with shape, colors have 'natures', which are dependent on the mage as well. Each color can have up to two natures depending on the mage (no more than two, but always at least one). For example, a color can 'extend and contract' and 'cut', or a color can be 'electric' in nature.

The colors range from Black to White and every shade in between. Pure Colors (Red, Blue, Black etc) are thought of as stronger than the Non-Pure Colors (Green-Yellow, Cyan, Silver etc). This, however, is unconfirmed as each color has its own shape and nature, so depending on the mage using Color Magic, a Non-Pure Color could be stronger than a Pure Color.

Trivia

 * Idea taken from the manga Over Image