You can make a doctoral thesis out of every "fart".
From whether RAL 9016 really only means RAL 9016,000, definitely ;-)
Take walks through new housing developments and when you have found the "white" that suits you, ring the doorbell and ask the builders. The answer will be "white" in 2/3 of the cases.
The answers will range from "huh?" through a slap in the face to "Doggy, sit!" if complete strangers come to the door without a bottle, palimpalim, and don't even want fries, but want to know what kind of white it is. That is not "white," that is "I don't know that!" (By the way, it just occurred to me that there is no "Persil white," "Spee white," "Ariel white," or "Dash white") *LOL*