smirnoff got it close enough. Films that are in both Color and B&W.
The first title I thought of was Pleasantville, but I thought that would be giving it away. I initially had a couple of old Horror film titles, well-known films, but the brief moments of color come as a shock and I didn't want to ruin that.
The opening scene in Cleo is in color because Varda gotta Varda.