Some search apps are intelligent enough to handle specific search inputs, for example, the one that includes the color of the desired product. To understand how it is done, let's take a brief look at how the search works. By default, when a user searches for a product, the main picture appears in search suggestions. But if the user searches for "blue heels," the smart search will show the picture of the blue shoes, even if the product has color swatches
and the blue is not the main product picture. The most elaborate search engines can find products even with complicated colors when a user searches for "blue and silver heels," as in the picture below.