Thanks Robert, that worked perfectly.

@Robert any chance you could take a look at this one? I've noticed that it works fine on desktop but reverts to standard colours on mobile. How can I fix that?

I think that's just mobile cache. Mobile browser cache is very hard, it's not easy to reset. Please leave the forum URL, I'll check it too.

Hi @Robert I have emailed support with login details for you because it is a paid access site. Thanks for taking a look.

Adding a plain comment for myself to this conversation so that I can refer to it if so required later.