[pcrh]

I'm surprised you were unfamiliar with words like "mauve", "wanton" or "sallow". These are fairly common in today's UK, but maybe less so in the US vernacular?

Jocosely is the only one I had a question over, until I realised it had the root "jocose".

[xwolfi]

It's because British people have such bad taste they still have mauve stuff. In French, the language it comes from, this color is synonymous with ugliness and the 60s hehe