Here’s a fairly obscure factoid that usually turns Big Richard’s into Lil’ Rich’s.
My other serious hobby is cars etc. Over the years, I’ve talked with or done business with three different high end paint & body shops that do national award winning Restoration work . One might find an original 69 Camaro convertible, Hemi Cuda or L88 Corvette being restored at these places at any given time.
Discussing color matching, all three said you can match the color, have the computer color matching camera with built-in paint formula detection etc BUT if even if the same pigments are used in both batches of paint if **the pigments are ground differently **in some light conditions the color won’t match.
For example the two batches of paint may match perfectly in direct sunlight but not match when it’s overcast because the slight difference in how the same pigments were ground.
Most of us wouldn’t see it but there a select few expert eyes that can see that level of difference.
Just ask your local Tetrachromat that can see 99 million more colors than the rest of us
Tetrachromacy is the possession of four cone cells. This allows organisms to have a four-dimensional color experience—something that fish, reptiles, and diural birds all have. Humans normally detect color through three cone cells in the eyes, making us trichromats. Ultimately, this difference means that humans see far less colors than these other organisms.
In the 1940s, however, scientists began to theorize that some humans may be tetrachromats. Females in particular are more likely to inherit this trait.