Neptune and Uranus are known to be ice giants. They are colored blue because of the components that can be found in the corresponding clients. Even if they seem similar, there are still some obvious differences between the two.
The way that Neptune rotates is similar to how other planets rotate but Uranus rotates in a different way. It is tilted so it rotates on its side. Uranus also has a ring while Neptune does not have any. Neptune is known to be a bit darker because it does not get too much light and heat from the sun.