Yes it is a deformed butterfly, so actually Patchou hasn't only copied the colours, he also copied the 4 elements the butterfly consists of. As long as something isn't copyrighted, registered or trademarked, it is perfectly legal to use anything similar to it.
Just look at the BMW M logo and the SSR Wheels logo:
These two companies has nothing to do with eachother, but SSR has used their logo for ages without any trouble with BMW. And for the record, BMW is one of many companies that is very strict when it comes to use of their brand and logo!