Have you ever picked a colour from a paint chart only for it to look completely different once on your walls??
It’s called the illuminant metamerism effect it is sometimes used to describe situations in which two material samples match when viewed under one light source but not another. Most types of fluorescent lights produce an irregular or peaky spectral emittance curve, so that two materials under fluorescent light or Sun light might not match
We explain a couple of reason why in today’s post.
Did you know that the lights you use to light your room and the position of the Sun during the day can change the colour of your interior and exterior painted walls.
We have had it in the past when the customer has absolutely loved a colour they have chosen from one of our colour charts, only to decided they don’t like it or complain it isn’t the colour they chose.
Well we certainly aren’t to blame, the paint certainly isn’t to blame, the colour chart isn’t to blame and neither are you.
But you can blame your interior lights or the time of day it is and even the angle of your walls and if your ceilings or other walls throw light onto each other.
Yes you can blame the Sun for making your chosen colour look different, as the sun moves it will either make your room brighter and then later darker, these time differences will have a visual effect on the colour on your walls.
The images below show you the power light has on a room, each image has the same colour on the walls and ceilings but added are different hues of light either from downlights or the Sun’s location when coming through a window at different times of the day.
Yes, the room is the same one in each image, but with different lighting as explained.

