We don’t! While we know that the specific wavelengths of light are detected the same, our perception of these wavelengths isn’t known to be the same between people.
In fact there’s good evidence that it isn’t and that our perception of color is influenced by neural development after birth. Trying to compare people’s perceptions is always a bit tricky for obvious reasons, but there are some ways this can be worked around, for example by gauging peoples instinctual emotional response to different colors, and trying to separate out responses that might be a result of life experience.
www.livescience.com/amp/21275-color-red-blue-scientists.html
Latest Answers