While Paris is a beautiful city, it is not known for beautiful sunsets. Pretty sunsets can occur anywhere in the world, but some weather conditions are more conducive to this type of sunset than others, and the weather in Paris is usually not of the type that produces them. However, there are exceptions, and I managed to catch such an exception while I was beneath the Eiffel Tower a few days ago, as you can see in this photo.
I've seen much nicer sunsets in Paris, but they are quite rare and very unpredictable. I recall one truly amazing sunset once that I was unable to photograph in color because I had my camera loaded with black and white film. There's a picture of it in my gallery of street photos on my Web site, but black and white doesn't do it justice.