Are the three colours trilogy connected?

Excuse me, could you clarify for me if the three colours trilogy - I'm assuming you're referring to the film series by Krzysztof Kieślowski - is indeed interconnected in some way? Are the stories and themes of each film meant to be seen as a cohesive narrative spanning across the three separate films, or are they simply three stand-alone movies that share a common aesthetic or color motif? I'm curious about the degree of connection between these films, if any.