without going into the fact he looks to be in poor condition for a frenchie... hes an iron grey butterfly or possibly a seal point butterfly.... these are very pale colours so the butterfly markings are less pronounced, he has white front legs and shoulders which would be cream in a either of those colour, he will have a white belly which would be grey in an iron grey (hard to tell which he is without a belly colour) and he has some white markings around his smut (whisker area), a butterfly is just ANY solid colour broken with white, to show they have to have very specific markings, but the term is still used to describe any lops with white markings, the pattern is more obvious on dark coloured animals such as black or blue as the contrast with the white is greater, but you can just as much get it on the pale grey / cream animals its just harder to tell
