Introduction to Colour Theory
The human eye can distinguish around 10,000 colours.
Physically, we are able to distinguish with colours, 'experiences of perception'
with material properties, like saturation, brightness, and tone.
The primary colours, do not come from any other  colour.
they are: Magenta, Cyan and Yellow
(they're represented up there in the chromatic circle)
The Secondary colours are obtained by mixing the primary colours.
For example:
violet is made with Magenta and Cyan.
Orange, Magenta plus Yellow
and green is Yellow plus Cyan
Tertiary colours are those which are obtained by mixing 3 colours.
For example, Violet-blue, Yellowish-green and yellowy-orange.
We are going to look at tone.
Tone is the colour in itself, it suggests the colour's chromatic quality, and is a synonym of colour.
It is the characteristic that also defines the mixing of colour with either white and/or black.
Tones can be divided into cool colours and warm colours.
warm colours are those that we associate with sunlight, fire, to warmth in general.
They would be Red, Yellow and Orange colours.
and the cool tones would be Blue and Green.
Cool colours are associated with water and everything that one would say represents cold things, winter, for example.
The terms warm and cool are used to classify the tones show said qualities.
These terms are designated, that why we say 'colour temperature'
Graphically, we can divide them into two sides.
The brightness of colour relates to the intensity or the level of 'energy'. It's the luminosity of colour.
which is the ability to reflect the colour white. in other words, the brightness.
it alludes to the clarity or obscurity of a tone.
It is a variable condition that can alter the appearance of a colour.
Luminosity can vary by adding black or white to a tone.
The saturation of a colour is related to the 'chromatic purity', or the lack of dissolution with white.
it constitutes the purity of the colour with respect to the colour grey.
and it depends on the quantity of white that's present
the more saturated a colour is, the more pure it is, and less grey is mixed into it.
as we add white, we get what we call, pastel colours.
well, apart from all of this we have to keep in mind the following slide which would be the interaction of colour.
the most determined property of colour would probably be its relative, behaviour.
because no colour can be evaluated when set aside from its surroundings.
In the book interactions of colour, by Josef Albers, states that the same colour can allow countless interpretations.
that means that one same tone can appear differently when placed over different colours of background.
this is proven here, and you can see, that it applies both to the complementary colours and the colour gamut.
the central colours are all the same, while it is the background that changes.
The scales and ranges of colour.
it is considered that white, black and grey are achromatic colours.
in other words, colour without colour.
colour scales can be chromatic or achromatic.
In the chromatic scale, the values of a tone are obtained by mixing pure colours with white or black.
this means that they can lose strength, chromatic and luminosity.
An achromatic scale will always be a scale of greys.
a continuous modulation from white to black.
Then there is the range, and it's types.
Range is defined as those scales that are formed of the gradual changing of colour, from its purest form to either white or black.
or a continuous series of warm or cool colours.
it could also be a succession of diverse colours that are similar.
Lastly, we will look at complementary colours.
these are the colours that are opposite each other in the chromatic circle
and when they are mixed they establish a maximum sense of contrast.
I have represented them with these arrows to make it clearer
For example, Violet and Yellow are on opposite sides of the circle and so are complementary colours.
