I'm not sure If I found the correct character style that you are talking about, but It has a huge list too. Let me explain better, all I really need Is something like this:
While analysing the texts, I have to change some words to one colour and other words to another colour, most time in the same paragraph. I do this in big texts (letters, laws, books, etc.), so It have to find a way to do this fast, with only one click.
whs tip was ok, I've noted here that "recent colour" is automatic. I tried to add another button like in the image above, but It seems they are the same object instance, so It's impossible to have two different colours (I edited with paintbrush).