I like Robert Delaunay, and also his wife, Sonia Delaunay. Their work involves a lot of bright, vibrant colors. It also was rather abstract or impressionistic, which I enjoyed. I think I like Piet Mondrian for similar reasons. Jan Sluyters would be another.
I also like JMW Turner a lot. I’m a sucker for lighting and dynamic skies in paintings, and his work features that very prominently. Frederic Edwin Church is another painter along these lines that I really enjoy.
A more contemporary passive that I like is Nina Tokhtaman Valetova. Her work also involves a lot of bold colors.
“Jones” is an American slang word meaning to be addicted to something, so “jonesing” for something means to crave something very strongly, and generally very vocally.
“Breve” is a coffee drink that is commonly made with half-and-half, which is a product that is equal parts cream and milk. I assume that people have taken to using the term to refer to half-and-half itself, but I’ve not personally heard that.
So the sentence is saying that their cat was addicted to half-and-half and would act like a junkie doing anything to get their next fix.