The human eye detects shades of colors. Depending on how sharp your eyes can pick up that shade determines what exactly that color looks like to you. Also, lighting depends. Say for instance you see a lemon in real life and a lemon on a computer screen. The lemon in real life is true yellow. The lemon on the computer screen is not. It is a mixture of green, red and blue; the only three colors a computer monitor can produce...and yes, even these letters i'm typing are from that same spectrum...they appear black, but are they really? think about researching that :). Ever seen the color spectrum on the old windows media player? you could customize the color settings? that goes off of the red, blue and green spectrum. Another factor is what you are. Dogs for instance are not really color blind. They see many of the same colors as us, but not all of them. And the colors they see have a more bland look to them. There yellow may look somewhat brown to us. That's because there retinas do not see light the same way as ours. So, in short, we do not always see the same colors as the next person because....well.....it seems pretty self explanatory from here...
One of the vision tests given to people with eye and brain problems is to arrange carefully prepared blocks with colored paint/ink on them according to the related increasing or progressive values - say from red to blue or to green.
There are known problems in seeing color and most of them have been well studied. Almost all of the problems have to do with not perceiving (very well) one of the color sensors in the eye. Thus a red/green color blind person does not see green as red but sees both as a sort of grey and can't tell them apart.
Using frequency selection, it is possible to test the left eye against the right to see if a person sees colors the same with each eye but words are so vague that asking people if they see "lemon yellow" just doesn't work.
Answers & Comments
The human eye detects shades of colors. Depending on how sharp your eyes can pick up that shade determines what exactly that color looks like to you. Also, lighting depends. Say for instance you see a lemon in real life and a lemon on a computer screen. The lemon in real life is true yellow. The lemon on the computer screen is not. It is a mixture of green, red and blue; the only three colors a computer monitor can produce...and yes, even these letters i'm typing are from that same spectrum...they appear black, but are they really? think about researching that :). Ever seen the color spectrum on the old windows media player? you could customize the color settings? that goes off of the red, blue and green spectrum. Another factor is what you are. Dogs for instance are not really color blind. They see many of the same colors as us, but not all of them. And the colors they see have a more bland look to them. There yellow may look somewhat brown to us. That's because there retinas do not see light the same way as ours. So, in short, we do not always see the same colors as the next person because....well.....it seems pretty self explanatory from here...
One of the vision tests given to people with eye and brain problems is to arrange carefully prepared blocks with colored paint/ink on them according to the related increasing or progressive values - say from red to blue or to green.
There are known problems in seeing color and most of them have been well studied. Almost all of the problems have to do with not perceiving (very well) one of the color sensors in the eye. Thus a red/green color blind person does not see green as red but sees both as a sort of grey and can't tell them apart.
Using frequency selection, it is possible to test the left eye against the right to see if a person sees colors the same with each eye but words are so vague that asking people if they see "lemon yellow" just doesn't work.
we dont....its the same reason why you cant explain a certain color to a blind person.