But it has lead me to study this phenomenon a bit more, since my job now is in color correction and digitization of photographs.
First, see some cool articles on the subject here: www.pinterest.com/roadkitten/graphics-and-editing/
Second, there's been research (and I'll be posting the articles to that pinterest site when I find them), that as our eyes age, our vision changes and colors become more yellow. I've seen much debate over the same photograph (usually a black and white photograph scanned into a digital RGB file set to an Adobe 1998 profile), where five people in my office see five different shades of grey... where one is seeing a green tinted grey, another sees it magenta tinted, blue tinted, or red tinted. The color of clothes the person perceiving the screen might even feed a tint to them if it's in their field of vision. Our photographing specialist had to paint the walls in the digital photography room blue/grey to keep the wash of gold tones down when he was shooting images of book pages. We even have a trick we play on our incoming student assistants where we hand them a black and white photo. They start in our office under the special "sunlight" florescent bulbs. They are told to walk outside our office and towards the window. As they leave our office, they pass under regular florescent bulbs. Then when they approach the window, they are under real sunlight. The greys in the image shift from pink tint, blue tint, green tint, and finally a yellow tint.
Third, all of this is also relative to calibration of the equipment and training of the eye to focus in on nuances. It is also seeming to be relative to the gender of the viewer. See the pinterest articles above.
Finally, there is a psychology to it. If a small child is told that this shade of aqua is green, even when the child grows up that adult may see green. It would take a retraining element, a social correction as it were, to help them see the aqua as aqua.
Overall, the importance should not be placed on who is right, because, as I like to say often, perception is nine tenths of the law. There is a existential element stated by Poe "is all we see or seem, but a dream within a dream." Just because I call this blue, it only fails to be labeled correctly when I do not get the point across to which item I was referring. The point is the dress, not the color of that dress.