UE4: Stylized colors using gradient mapping
Apply a unique look to your game with a post-process shader.
Get project files: https://techartaid.com/products/
Retro posters, comic books, Sin City, toon shading, all of them are a good fit for this technique.
Shader screenshot: https://drive.google.com/open?id=0B3a...
Optimized shader ;) https://drive.google.com/file/d/0B3aZ...