There are many reasons that grey will appear different in different lights. Even without any blue pigment, if there is a slightly bluish light shining on the grey, it will look light blue. A warmer color closer to a red can make the grey look slightly purple. Remember that you cannot control all lighting. Cloudiness, early morning sunrise and late evening sunset can cast warmer or cooler light. Obviously you cannot change this. The best advise is to order your color swatches and look at them together in different lights at different times of the day. For professional help with colors and in Indianapolis and Greenwood IN and other great tools,
How your eye perceives color
Your eye functions on two distinct levels. In low light your eye becomes scotopic and light is detected by rod cells of the retina. In high light situations you eye can use mainly cone cells. This means that your eye actually functions differently in different levels of light. This is also effected by the level of light that your cone cells stop functioning properly or function differently. The three cones are: red light, green light, and light intensity. Therefore your brain is guessing on how much blue is there by taking the intensity minus the red and green.
Temperatures of light
Everybody has seen the three lights in the paint selection area. These will help you see the differences in color under different temperature light. Cloudiness, sunrise, sunsets and other factors can be a huge factor in how you see that color. Always order a large format color chip and look at it several times a day at various times.
Is grey even a color
Whether you are a physicist, lighting expert, mathematician or a painter. This is a topic of much debate and confusion. The bottom line to me is making sure that you have the grey that makes you happy at ALL times of the day. So the science that is applicable is that of the eye and brain working together. Simply put your eye does not perceive grey well. There is a natural tendency to lean towards an actual color that exists in light. If you don’t want to perceive the grey as a bluish color. We suggest moving to a greenish grey.
Why does my spouse see a different color
(Ill touch lightly on this topic as my wife will be proofreading this article). Women, having a different set of chromosomes can sometimes see more colors. This is a phenomenon known as Tetrachromacy. Men are not capable of this. Therefore women can sometime see a larger bandwidth of color. Fish, amphibians, insects, and snakes also have cone cells that peak on four wavelengths instead of three.
Association of color
Studies have shown that you can associate colors and never realize it. This can change how you see a color and how you feel about that color. You might simply be associating grey with another color
How nearby colors change how colors are perceived
Putting a grey next to a red will always make it appear blue. This is simply your eye playing tricks on you. You see the red and shazam the grey is blue. This can also play a factor when you are choosing colors from a fan deck. When you are choosing colors, by default, you are looking at those colors next to other colors that you will never have in your home. The bright whit border will also play tricks on you eye making the color appear darker than it will on your wall. So once again we suggest ordering a larger format of that color before you paint your walls to only find out that you hate the color.