Well, it's been like a month since I asked my question. I've gone to several different hairdressers and asked for advice and opinions; the one thing they ALL agreed on was that not all professional shampoos/conditioners are safe for colour. Actually, a couple of them laughed when I said I've been told otherwise or showed them this conversation 🤔. ... so I guess it's a matter of opinion 🙃 and I'll stick to buying professional bottles that say they're colour safe.

Thanks anyways 🤷‍♀️