color course

COLOR IS HUMAN VISION

- The eye is the window to the color experience. Whether the light comes directly from a light source and is subject to additive light mixing or is reflected by or transmitted through a material, it is the brightness and balance of the light energy that creates the color stimulus.

	HOW THE EYE SENSES COLOR
- Light enters the eye, passing through the cornea, aqueous humor, the lens, through the vitreous humor, and falls on the light-sensitive retina.
- Three types of cone cells in the retina respond to the color balance of the light stimulus. There are red cone cell responders, green cone cell responders and blue cone cell responders. Since there are more than 7 million cone cells in the retina, we can see many different colors in one scene at the same time. Rod cells relate to the brightness of light (white to black). There are over 17 million rod cells.
- Note that each of the cone cell responses which are diagrammed as the R, G, B curves covers a broad band of color space, that the responses overlap and have areas where they are more sensitive than other areas and that they are at a different level of response. - Note that the R, G, B curves are different. This means that human color response is different for different color ranges; for example, we are more sensitive to blue than green or red, and we see lighter colors better (in a more sensitive way) than darker colors.

We see all colors in our vision range at the same time. Sometimes the relationship between colors that surround each other confuses our color vision.

Look at the color in the center of each display. It looks different because the surround color influences the way you see the color. If we make the surround color the same, you can easily see that the center color is the same. When visually judging colors in a design, it is important to separate the colors from the surround influence.


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