El Color

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Hue is the name of the colour family to which a colour belongs. A red-orange which would have more red than orange, would belong to the family of reds, and so its hue would be considered red.

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VALUE
A value of a colour is how dark or light a colour is. The value of any colour can be altered by adding white,creating a tint (which raises the value), or black, which creates a shade (which lowers the value).
a shade (which lowers the value).
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CHROMA
Chroma refers to a colour’s purity. The stronger or brighter a colour is, the higher its chroma. The weaker or more mixed a colour is, the lower is it’s chroma. You can alter the chroma of a colour by adding white, grey, another colour or black.Chroma is also called saturation.
HARACTERISTICS OF COLOUR
There are also 7 characteristics of colour that can affect any colour composition. These are listed below:
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ADVANCE OR RECEDE
Colour has the ability to advance toward a viewer or appear to recede away. The rule of thumb has been that warm colours advance and cool colours recede. Think of it this way… warm colours as in those insunlight and the blues in your background that create depth.
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APPEAR WARM OR COOL
Colour temperature is strongly linked to colour depth. The same rules apply here. Warm colours appear to have a radiant heat and cool colours appear to generate a coolness.
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Here’s the controversy regarding warm and cool colours: Many people can’t make up their minds which colours should be considered warmor cool. This is an argument that’s been raging for centuries. Some people quite simply, split the colour wheel in half into warm and cool. Others apply a general rule of any colour that contains red, is considered warm. Personally, I don’t believe any of this.
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Green has the ability to be warm (lime) and cool (aquamarine). And you know what? So does magenta. The above colour harmony wascreated using the middle magenta hue as a base. The intent was to create a colour harmony that evoked a cold feeling, which it does. My point is that both magenta and green straddle the warm-cool boundary. They are the only ones that have that ability. This is why I see them as intermediate colours that can blend into warm or cool.
So really, the split between warm and cool is more like this…
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APPEAR HEAVY OR LIGHT
Rich, saturated colours can appear heavy and heavily tinted colours can appear light.
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CREATE MOVEMENT
Colour can create movement by changing tonal values.
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SYMBOLIC
Although this characteristic is strongly linked to geographical location and culture, there are very basic symbols that cross cultural borders such as blue representing sky or redrepresenting fire etc.
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CREATE ILLUSIONS
Paint a small room in dark, dense colour and the room will appear smaller, paint it in a pastel colour and it will appear larger.

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You can see it happening here. The red square on the left appears larger than the one on the right. It seems to be almost bulging. The black square on the right seems a little smaller and the red seems to somehowswell. The more radiant (saturated) a colour is, the more it will “swell” or appear larger.
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ENHANCE SHAPE AND FORM
A red outline around any dark shape on a light background will soften its edge without blending it in. The red outline enhances (reduces) the shape’s contrasting edge. At the same time, colours that gradate to white (or a distance colour) on the edge of a shape will enhance theform by creating more depth.

Colour Harmony

Colour harmony is organizing colours in a pleasing manner following the rules of harmonic colour and there are 10 of them. It’s pure aesthetics at its basic level. Before anything is created, it’s figuring out which colours you will use. You need at least two colours to build a harmony, but you can start with one as a base colour. Everything else...