As I look up at your 70s colour recall, I get it, but I would certainly need an orangey brown leather sofa colour with some acrylic paint that I accidently painted on it. I have blocked what the paint colour was, but I can see the colour of leather. It is chilling! I'll bet my mother knows.
In the 90s we lived in Rome and I did all that sponging of walls. It really was a 90s thing. The first thing I'm doing when I finish this post is to photocopy lots of your color recall sheets. I am gonna love doing this! Thank you.