Modesty Blaise from 1966 (Wikipedia, IMDb)

Directed by Joseph Losey (Wikipedia, IMDb)
Monica Vitti (Wikipedia, IMDb)
Terrence Stamp (Wikipedia, IMDb)
Dirk Bogarde (Wikipedia, IMDb)
Harry Andrews (Wikipedia, IMDb)

There's not much in it for the fans of the original comic book Modesty and as a movie it's pretty awful - but the sets, the costumes, the op-art, the cars, the style and especially the use of color in virtually every frame is very cool - as I hope these stills will show. If you agree maybe you should get it.