Create a module for visual search of products

You should be able to build something like that using the Search API, but I doubt there's going to be enough niche demand to have a specific module developed just for a color taxonomy term. In fact, if you look at a Kickstart 2.x installation, it uses the Search API and Facet API to have colors rendered in a sidebar block. Through the theme layer, you could instead render those facets as color swatches similar to the way we do in the search results and Add to Cart form, and you'd have your feature. : )

Right, what I'm saying is that sort of module is too niche to be developed and maintained specifically for that feature, but you can build just that using the Search API and existing tools. That's the way of Drupal, and it'll only be more true on Drupal 8 - the most used modules are those that provide abstract bits of functionality that you use to create concrete features, like a visual search facet. : )