I still occasionally meet people who insist that all CIE steam engines were black*; others who see black and say it's grey, and others who see grey and thinks it's black.
As can be seen above, there's probably no colour that seems to vary as much when it's photographed in different light! This means that photographs are very misleading in some cases, and in others anyone who personally remembers the colour concerned will be able to see that whatever is in a particular photo IS right, based on memory. And some people have better memories for colour than other!
I'll add my tuppence-worth to the idea that I would love to see an 071 in black'n'tan, or even lined flying-snail-adorned CIE green! (Why not? A lot of people about would remember it from buses at least!)..........
(*Many were after the mid 1950s, but the majority weren't!)