Depending on the context, you can describe it as incongruous juxtaposition.
From google dictionary:
jux·ta·po·si·tion ˌjəkstəpəˈziSH(ə)n/ noun
- the fact of two things being seen or placed close together with contrasting effect. "the juxtaposition of these two images"
in·con·gru·ous
ˌinˈkäNGɡro͞oəs/ adjective
- not in harmony or keeping with the surroundings or other aspects of something. "the duffel coat looked incongruous with the black dress she wore underneath"