Vaporwave art is easily recognized. It is characterised by its collage-like nature, dreamish feel and references to 80ies and 90ies popculture.
Artwork often contains some of these elements:
Pink, purple and cyan colours
Greek/Roman statues/busts
Japanese text and imagery
Fiji water and/or Arizona tea
(pink) dolphins
Wireframes and low-poly 3D models
80ies and 90ies imagery
Beaches, palmtrees,...
References to sadness or melancholia
Retro videogames, old Windows versions and old hardware
