Design and technology
Ben craven
27/02/14
We are all colourblind.
There are 5 million light sensitive cells on the retina. An image is formed on the retina. This goes down optic nerve to what we actually see with - the brain. Each cell responds to one colour - the cell is most sensitive to a particular wavelength of light...yellow say. The signal the cell produces becomes weaker if the wavelength is less/more or if it's brighter/darker. Red, green and blue cones (what your cells have) - major overlap between them. 3 is a majorly important number in colour vision.
When you mix coloured lights the effects are: green + blue = greeny blue, red + blue = reddish blue, green + red = yellow (the only one that is not a mixture of the two... When you mix red and green paint you get brown) - not physics but biology. When you mix all three you get white. Yellow light, and a mix of red and green (yellow) look the same, but show a red pepper in very different ways. We can't see the difference though. Everyone sees slightly differently. Each person's pigment is denser than others. Different parts of your eye see different colours as well.
Pigeons have 4 types of light cells in our eyes, dogs have 2, we have three. When the lighting is bizarre we can see colours to be different (shades) - the moon is really dark, dark slade, but in fact it looks white because it is in a very light place. The colours surrounding a colour can really affect what it looks like (light or dark)
Why do we see colour? We can forget easily that we're watching a black and white film. Well, it can be a matter of life and death. We can see fruit (food) a long way off with colour: fruits change to an easy colour when they are ripe. The plants are attractive colours so that they get eaten and then their seeds are dispersed through poo.
Psychological effect of red:
Colour is of major importance in the natural world and therefore in design as well. The colour a product/logo/graphic is may determine how successful it is. Therefore colour has to be a major consideration in all aspects of design and cannot be overlooked.
We are all colourblind.
There are 5 million light sensitive cells on the retina. An image is formed on the retina. This goes down optic nerve to what we actually see with - the brain. Each cell responds to one colour - the cell is most sensitive to a particular wavelength of light...yellow say. The signal the cell produces becomes weaker if the wavelength is less/more or if it's brighter/darker. Red, green and blue cones (what your cells have) - major overlap between them. 3 is a majorly important number in colour vision.
When you mix coloured lights the effects are: green + blue = greeny blue, red + blue = reddish blue, green + red = yellow (the only one that is not a mixture of the two... When you mix red and green paint you get brown) - not physics but biology. When you mix all three you get white. Yellow light, and a mix of red and green (yellow) look the same, but show a red pepper in very different ways. We can't see the difference though. Everyone sees slightly differently. Each person's pigment is denser than others. Different parts of your eye see different colours as well.
Pigeons have 4 types of light cells in our eyes, dogs have 2, we have three. When the lighting is bizarre we can see colours to be different (shades) - the moon is really dark, dark slade, but in fact it looks white because it is in a very light place. The colours surrounding a colour can really affect what it looks like (light or dark)
Why do we see colour? We can forget easily that we're watching a black and white film. Well, it can be a matter of life and death. We can see fruit (food) a long way off with colour: fruits change to an easy colour when they are ripe. The plants are attractive colours so that they get eaten and then their seeds are dispersed through poo.
Psychological effect of red:
- Olympics - given red or blue randomly. More likely to win if in red than in blue.
- Teams that wear red are more likely to win.
- The colour red slows down people's answers to questions.
- Red provokes feelings of avoidance.
Colour is of major importance in the natural world and therefore in design as well. The colour a product/logo/graphic is may determine how successful it is. Therefore colour has to be a major consideration in all aspects of design and cannot be overlooked.
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